Academic literature on the topic 'Compression coating'
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Journal articles on the topic "Compression coating"
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PUHAKKA, TEEMU, ISKO KAJANTO, and NINA PYKÄLÄINEN. "A method for measuring the in-plane compressive strength and the compression behavior of coating layers." July 2011 10, no. 7 (2011): 29–34. http://dx.doi.org/10.32964/tj10.7.29.
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Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.
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Rastogi, Vibhore K., and Pieter Samyn. "Compression Molding of Polyhydroxybutyrate Nano-Composite Films as Coating on Paper Substrates." Materials Proceedings 2, no. 1 (2020): 31. http://dx.doi.org/10.3390/ciwc2020-06797.
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After successful preparation of master batch formulations including polyhydroxybutyrate (PHB) and fibrillated cellulose, the compositions of PHB with different types and concentrations of fillers were used for the deposition of a coating on packaging paper grades, by using compression molding technique in a hydraulic press. The resulting paper coatings are demonstrated to provide a green solution for the production of protective barrier layer films with tunable hydrophobicity and oxygen barrier resistance. The processing of the nanocomposites into flat and homogeneous coatings was optimized for different conditions of molding temperature and times, in particular, the flow conditions of the coating under pressing in contact with the paper substrate strongly depends on the presence of fillers. The effects of filler types on adhesion of the coating at the paper/polymer interface were investigated and the poor adhesion of native PHB coatings was improved after hydrophobic surface modification of the nanocellulose fillers. Under compression molding, the unique inclusion styrene-maleimide nanoparticles with encapsulated wax attached to the nanocellulose fiber surface enhanced the flowing properties of the coating by eliminating fiber agglomeration in contact with the paper substrate and reducing the effects of fiber pull outs. Therefore, hydrophobic fiber modification and the role of wax as a lubricant is necessary to obtain a homogenous dispersion during compressing molding of coating materials for papers.
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Pellegrino, Antonio, Maria Jesus Perez-Martin, Kalin Dragnevski, Giuseppe Zumpano, and Nik Petrinic. "Temperature and strain rate dependent mechanical response of METCO 601 aluminium-polyester abradable seal coating." EPJ Web of Conferences 183 (2018): 04012. http://dx.doi.org/10.1051/epjconf/201818304012.
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Abradable coatings are utilised as sacrificial materials in low-pressure compressor casings, and in intermediate and high pressure compressors and seals. The adoption of abradable coatings allows for the clearance between compressor blades and casing to be minimised, increasing the overall efficiency of the engine. Quasi-static and dynamic experiments at different temperatures are conducted to characterise the mechanical response of a thermally-sprayed abradable seal coating. The material is composed of an aluminium continuum matrix and fairly well-dispersed polyester particles. Stress versus strain histories are measured in uniaxial tension and compression at strain rates ranging from 10-3 to 102 s-1, via non-standard experimental techniques. The material displays sensitivity to the strain rate and to the imposed temperature. The mechanical behaviour is brittle in tension while it exhibits higher strains to failure in compression. The material is characterised by a pronounced tension/compression asymmetry.
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Ramesh, Balasubramanian, Ammar H. Elsheikh, Shanmugam Satishkumar, et al. "The Influence of Boron Carbide on the Mechanical Properties and Bonding Strength of B4C/Nickel 63 Coatings of Brake Disc." Coatings 12, no. 5 (2022): 663. http://dx.doi.org/10.3390/coatings12050663.
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Metal-based ceramic composite laser cladding offers substantial compensations in enhancing brake disc surface characteristics. Laser cladding was utilized to combine B4C powder (10–40%) with Ni 63 powder to make Boron Carbide (B4C)/Nickel 63 composite coatings. For the subsequent experiments, the specimens were ground and polished. Bonding strength, fracture toughness, and residual stress were examined with the B4C content. The fracture morphologies were checked using a scanning electron microscope (SEM). It was observed that the bonding strength of various coatings might approach 175 MPa. Best bonding was observed when the B4C level was between 15% and 30%. The porousness of the coating continuously raised as B4C content increased. The coating’s maximum permeability was 5.6% after the B4C level reached 30%. As the B4C level in the coating grew, the coating’s compression resistance decreased. The bonding strength was within desirable limits, and compression resistance was consistently strong. The material bending strength increased when the B4C materials were reduced below 35%; at this level, the bending strength was highest. The bending strength was covered by the optimal range of bonding strength. Good bonding strength and mechanical characteristics were achieved when B4C content was 20% to 30%. The 20% B4C coating had the smoothest fracture morphologies and the strongest bonding strength, making it the most stable. For the estimation of total matrix deformation and corresponding coating stress on coated brake discs, Ansys software was utilized to create a static structural model.
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Isaac, Festus O. "A Review of Coating Methods and Their Applications in Compression and Spark-Ignition Engines for Enhanced Performance." FUOYE Journal of Engineering and Technology 7, no. 2 (2022): 217–21. http://dx.doi.org/10.46792/fuoyejet.v7i2.810.
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Coating of metallic surfaces such as cylinder heads, cylinder liners, piston heads and exhaust-valves in Internal Combustion Engines (ICEs) has improved engine performance in areas of brake-thermal-efficiency including brake-specific-fuel consumption, etc. This review showed different methods of coating in compression and spark-ignition engines for improved performance using different coating thicknesses on the metallic surfaces. These coating thicknesses may be either minimum or maximum depending on the coating method used. The coating methods discussed in this paper were Thermal Spraying (TS), Physical-Vapour Deposition (PVD), Chemical-Vapour Deposition (CVD) and Ion Implantation methods. Minimum thicknesses were achieved using the PVD, CVD and Ion-Implantation methods. In addition, Sol-Gel and Slurry coatings were also discussed. Having considered these methods of coating, thermal-spraying method was recommended for compression and spark-ignition engines because it produces temperature ranging from 8000 K-14000 K on surfaces with thick coating thicknesses.
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Zaytzev, A. N., A. N. Lukianova, and D. A. Demoretsky. "Assessment of Shear Bond Strength of Thermal Spray Coatings by Applying Prismatic Samples." Solid State Phenomena 337 (October 14, 2022): 35–41. http://dx.doi.org/10.4028/p-297el3.
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The purpose of this study was the research for a non-standardized method of measuring the shear bond strength at constant compression force and compare with the shear testing methods on cylindrical and prismatic samples, like DIN 50161:1977-10, DIN EN15340-2007. The conducted comparative analysis showed a significant shortcoming of the well-known methods for assessing the shear bond strength on samples for industrial application. The main one is an inability to measure the “actual/real” adhesion shear strength of thermal spray coatings for industrial parts. The shear bond strength of plasma-sprayed coating MgAl2O4 with thickness 0.30-has been investigated by applying the prismatic samples (linear dimensions of shear area 1.5-), using Nanovea scratch tester at compression forces ranging from 1 to 70 N. Shear force-displacement curves get essential information about adhesion/cohesion, delamination and cracking properties of thermal spray coating. An increase of shear forces is primarily associated with a rise in friction forces at the coating delamination boundary. Applying for parts of the ITER blanket modules, this research has demonstrated the importance of practical application of the shear testing results at compressive loads for ensuring product life.
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Scardi, Paolo, Matteo Leoni, M. Loch, and G. Barbezat. "Elastic Behaviour of Thin Stabilized-Zirconia Coatings." Materials Science Forum 443-444 (January 2004): 77–82. http://dx.doi.org/10.4028/www.scientific.net/msf.443-444.77.
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The residual stress in thin coatings of yttria stabilised-zirconia produced by Low Pressure Plasma Spraying were measured by X-ray Diffraction, using laboratory as well as synchrotron radiation sources. The specific microstructure, with absence of texture and fine distribution of nearly equiaxed grains, point out that despite the markedly anisotropic nature of cubic zirconia, coatings can be considered as macroscopically isotropic. This picture is also confirmed by the results of a parallel study, where the X-ray elastic constants were measured in-situ along two crystallographic directions ([440] and [620]): measured values agree fairly well with those calculated from single-crystal data under the Neerfeld-Hill assumptions. SR XRD provided a detailed information on the stress field across the thickness of the zirconia coatings. In particular the presence of a stress gradient was observed and modelled. The average stress is compressive, and increases with the coating thickness. Compression tend to increase from the surface toward the inside of the coating reaching a maximum of ~-1.0 GPa in a 24 µm coating.
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Christophliemk, Hanna, Erik Bohlin, Per Emilsson, and Lars Järnström. "Surface Analyses of Thin Multiple Layer Barrier Coatings of Poly(vinyl alcohol) for Paperboard." Coatings 13, no. 9 (2023): 1489. http://dx.doi.org/10.3390/coatings13091489.
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The hypothesis of the present study is that thin multiple layer coatings on paperboard from the aqueous solutions of poly(vinyl alcohol) (PVOH) at high machine speeds is more effective in terms of barrier properties than one or two thick layers. The objectives included attempts to use surface roughness parameters to understand the coating process and mechanisms behind coating defects. The present study is focused on pilot-scaled PVOH coating onto uncoated paperboard at machine speeds of 400 m/min. The multiple coating operation was carried out in six passes with a dry coat weight of about 1 g/m2 in each layer. The concept of thin multiple coatings resulted in coated surfaces without detected pinholes and with Kit rating 12 after only two thin layers. However, the oxygen transmission rates were still fairly high (100 ± 89 cm3/m2 day atm) after six layers, and some coating defects (such as craters and cracks) could be identified. The analyses of surface structure indicated that the surface properties are affected by water uptake during the coating processes. The compression of paperboard beneath the metering element seemed to be required to achieve homogeneous thin layers. However, an analysis of defects revealed flaws and inhomogeneities near objects protruding from the surface, such as surface fibers and craters, caused by blistering. For rough paperboard substrates, the desired barrier properties may require a careful balance between sufficient compression for fiber coverage and gentle compression in order to avoid defects near craters and surface fibers.
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Gusev, A. D., L. N. Petryanina, and M. A. Derina. "Influence of the Characteristics of Crumb Rubber on the Properties of Street Trauma-Safe Coatings." Ecology and Industry of Russia 25, no. 2 (2021): 12–17. http://dx.doi.org/10.18412/1816-0395-2021-2-12-17.
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The properties of trauma-safe coatings produced in natural conditions without the influence of pressure and temperature based) on crumb rubber obtained by baro-destructive technology (compression or compression with shearof processing are considered. Dependences of the strength and durability of the coating on the methods of producing crumb rubber and the methods of its processing, as well as the influence of the fractional composition of crumb rubber on the strength of samples of trauma-safe coating made without pressure and with different binder content, have been revealed. The optimal composition of crumb and binder has been determined. The use of the optimal composition of trauma-safe coatings in the real sector of the economy has been confirmed.
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Hagen, Leif, Jonas Baumann, Markus Heidelmann, Dirk Biermann, and Wolfgang Tillmann. "Machine Hammer Peening and Its Effect on the Surface Integrity of Arc-Sprayed WC-W2C-FeCMnSi Coatings." Coatings 13, no. 9 (2023): 1563. http://dx.doi.org/10.3390/coatings13091563.
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With respect to post-processing techniques in the field of surface engineering, it was recently found that machine hammer peening (MHP) represents a promising approach to functionalizing thermally sprayed coatings as the MHP contributes to a compression of the coating, enabling the potential to reduce the coating porosity as well as the protruding peaks of the rough as-sprayed coating surface. The MHP also has the potential to induce compressive residual stresses in the coating surface, which can positively affect the mechanical and tribological properties. Arc-sprayed tungsten carbide-reinforced Fe-based coatings pose an appropriate candidate to counteract the wear of tribologically stressed surfaces. Due to the inherent process characteristics, however, these coatings are mostly characterized by a heterogeneous lamellar microstructure with residual porosity and interstratified with a certain amount of oxides, as well as the presence of tensile residual stresses. To adjust their microstructural and mechanical coating properties, the applicability of a subsequent MHP was evaluated in this study. Therefore, arc-sprayed WC-W2C reinforced FeCMnSi coatings are deposited using either argon or compressed air as atomization and shroud gas, providing different lamellar structures and oxide content. The effect of MHP on the surface integrity of the WC-W2C-FeCMnSi coating is investigated with respect to its porosity, lamellar structure, hardness, and residual stresses, which are known as relevant influencing factors on the performance of tribologically stressed components. It was found that the MHP leads to reduced porosity and lamella thickness as well as increased hardness due to strain hardening effects. Furthermore, it was demonstrated that the MHP leads to the introduction of compressive residual stresses, which contribute to a decline in tensile residual stresses in the near-surface area.
Dissertations / Theses on the topic "Compression coating"
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Sieh, Raymond. "Self-lubricating non-cyanide silver-polytetrafluoroethylene composite coating for threaded compression fittings." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9703.
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Silver is a precious metal that has traditionally been used for jewellery and money. It also possesses desirable properties such as being corrosion resistant and having good electrical conductivity, resulting in its use for industrial applications. Furthermore, it is also recognised for its tribological properties in non-cost prohibitive applications. Silver can be used as a surface coating and can be deposited using an electroplating process. The utilisation of silver as a surface coating is advantageous and sustainable, as the substrate material properties are enhanced while usage of silver is kept to a minimum. On the other hand, electroplating has been used for over a century. It is a process which is able to produce a layer of uniform and dense coating that adheres well to the substrate metal, thus modifying the properties of the substrate. It benefits from being relatively low cost and is scalable. Silver is electroplated onto stainless steel threaded compression fittings to prevent galling. Traditional silver electroplating, which contains the use of cyanide as a complexing agent in the electroplating bath, is still in use within industry, even to this day. Cyanide, in its various forms can be poisonous, toxic and even lethal, which presents a risk during the silver electroplating process. Furthermore, the toxic wastes created during the cyanide silver electroplating process are detrimental to the environment. The aim of this work is to develop a self-lubricating non-cyanide silver PTFE composite coating suitable for use in threaded compression fittings of the ferruled type. The composite can be considered self-lubricating when a concentration of 8% or more by volume of the self-lubricating PTFE substance is incorporated. My original contribution to knowledge is firstly the successful development and characterisation of a self-lubricating non-cynanide Ag-PTFE coating on stainless steel without a strike resulting in improved CoF of 0.06 from the CoF of 0.6 based on an unlubricated surface. Secondly is the application of a non-cyanide Ag-PTFE MMC for threaded compression fittings. Thirdly is the characterisation of the make-up process of threaded compression fittings through the proposed use of the torque-angle slope in assessing coating performance for threaded compression fittings during make-up. Conclusions that can be drawn for the work are that the performance non-cyanide Ag-PTFE coating exceeded the performance of the pure Ag coating made using the same non-cyanide process. Moreover, the performance of the Ag-PTFE coating shows promising results when compared to the performance of the commercial silver cyanide coating. As a viable replacement to the current silver cyanide process, the self-lubricating non-cyanide Ag-PTFE coating, will improve the working conditions and have a positive contribution to the environment. Moreover, a thinner coating with has the potential to reduce raw material usage and electroplating waste disposal costs.
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Miller, David J. "The selection and testing of compression seal and chamber coating materials for the pivotal engine™." Thesis, University of Canterbury. Mechanical Engineering, 2006. http://hdl.handle.net/10092/1569.
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Wear and friction tests were conducted on a rotational tribometer to identify material
couples for compression seals and chamber coatings to extend the service life of the
Pivotal Engine™. Potential materials were identified based on reports in the literature
of successful use in similar environments. From the rotational tribometer tests, the
best material couple was found to be reaction bonded silicon nitride against a Sulzer
Metco F4301 plasma sprayed coating followed by a Total Seal TiN coated seal
against the F4301 coating. However, the performance predicted by the rotational
tribometer was not realised in a fired engine, where the TiN coated seal wore almost
as fast as an uncoated seal. This discrepancy was due to the large differences in
operating conditions between the rotational tribometer and the fired engine,
particularly the reciprocating motion of the engine. The different operating conditions
mean that the results from the rotational tribometer have little or no relevance actual
performance in the engine.
To overcome the limitations of the rotational tribometer a reciprocating tribometer
was designed and built. The performance predicted by the reciprocating tribometer
was much closer to the observed wear rates from the engine, particularly with the
Total Seal TiN coated seals. Some of the results from the reciprocating tribometer
were a direct-contradiction to those obtained on the rotational tribometer. When tested
on the rotational tribometer the nitrided stainless steel seal wear rate was lower than
that of the Mazda cast iron seal. However, on the reciprocating tribometer the Mazda
cast iron seal had a lower wear rate than the nitrided stainless steel seal. From the
testing conducted on the reciprocating tribometer the best material couple was found
to be Total Seal TiN coated seals on the F4301 chamber coating. However, this
material couple cannot be recommended to increase the seal life in the Pivotal
Engine™ because at the conclusion of a twenty hour test the Total Seal TiN coating
had worn through to the substrate. In addition to testing different materials, different
oils were tested while keeping the wear couple constant. The oil that offered the best
wear protection to both the seal and chamber coating was Castrol A747. These tests
showed that different oils have as much effect as different materials.
Even with the best material combinations (Total Seal TiN seal, F4301 chamber
coating) the seal wear rates in the Pivotal Engine™ are much higher than would be
expected in other engines. This leads to the hypothesis that the origin of high seal
wear in the Pivotal Engine™ is not due to material properties, but to design issues.
The most likely problem is distortion of the chamber, which causes high localised seal
loadings, and in turn causing high seal wear.
3
Ghazal, Nadia Abder Rahman Ali. "Influence of excipients on stabilisation of amorphous cefuroxime axetil under process conditions of compression and coating." Thesis, University of Bath, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413061.
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Ståhlberg, Daniel. "Thermoset polymers and coatings subjected to high compressive loads." Doctoral thesis, KTH, Fiber- och polymerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4091.
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This study describes the mechanical response of thermoset polymers under high compressive loads. The study is divided into two parts. The first part focuses on the behaviour of a powder coating when used in a clamping force joint and how the properties vary when the chemical and physical structure of the coating is changed. The second part discusses the fundamental understanding of the behaviour of thermoset polymers with small thickness-to-width ratio subjected to compressive stresses, the aim being to develop mathematical material models for viscoelastic materials under high compressive loads. In the first part polyester powder coatings were used with variations in molecular weight, number of functional groups of the resin, amount and type of filler and thickness of the coating. The coatings were subjected to conventional tests for coatings and polymers and also to specially designed tests developed to study the behaviour of powder coatings in clamping force joints. The high compressive loads in a clamping force joint put high demands on the relaxation and creep resistance of the coating and the study shows the importance of crosslink density, filler content, and also coating thickness in order to achieve the desired mechanical properties of a coating. A high reactivity of the resin, facilitating a high crosslink density and hence a high Tg, is the most important property of the coating. A film with high crosslink density shows increase in relaxation time and in apparent yield strength under compression, and also an increase in relaxation modulus and storage modulus in tension at temperatures above Tg. Addition of fillers reduces the deformation during compression and tension, but also induces a lower strain at break and hence a more brittle coating. The reinforcing effect of the fillers is pronounced when increasing the crosslink density of the coating, especially in the compression tests. The effect is evident in compression even at low amounts of fillers, where the relaxation time and resistance to deformation are strongly increased. The combination of high crosslink density and addition of fillers is therefore desirable since fillers then can be used moderately in order to achieve a reinforcing effect in compression while minimising embrittlement. The study also showed that increased coating thickness will give rise to defects in the coating, especially voids and blisters due to evaporation of water formed during the curing of the polyester powder coating. These defects will give rise to stress concentrations and increased plastic deformations in the coating, impairing the properties of the clamping force joint. The results from relaxation tests in tension were used to create a micromechanical model. This model was used in finite element modelling to estimate the loss of clamping force in a screw joint and to correlate with the experimental results of the powder coatings. In the second part of the study a well-defined free radically cured vinyl ester resin was used and studied in six different geometries in order to determine the dependence of apparent mechanical properties on the particular size and shape of a sample when it is subjected to high compressive loads. Variation of the specimen thickness, boundary conditions and loading conditions reveals that the geometry of the sample has a significant effect on the mechanical performance of the polymer. The apparent modulus and the yield strength increase dramatically when the thickness-to-width ratio of the sample is reduced, whereas they decrease when the friction between the sample and the compression plate is reduced. The creep strain rate decreases when the thickness of the material is reduced and it decreases even more when the amount of material surrounding the compressed part of the sample is increased. Creep and strain recovery tests on large specimens were used to develop a mathematical model including non-linear viscoelastic and viscoplastic response of a thermoset vinyl ester. The model was used in FEM calculations where the experimental results were compared with the calculated results in order to model the trends of the material response when varying the sample geometry.<br>QC 20100921
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Ko, Seunghyun. "Selecting Best Compromises among Performance Measures during In-Mold Coating of Sheet Molding Compound Compression Molding Parts." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430756657.
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Tunón, Åsa. "Preparation of Tablets from Reservoir Pellets with an Emphasis on the Compression Behaviour and Drug Release." Doctoral thesis, Uppsala University, Department of Pharmacy, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3411.
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<p>The preparation of multiple unit tablets was investigated in this thesis with the intention of gaining a deeper understanding of some of the factors that influence the properties of such tablets.</p><p>Initially, three different types of pellets (drug, soft and disintegrant pellets) were combined as a model to investigate the ability of the mixture to form disintegrating tablets. The proportions of the different pellets and the type of disintegrant used were factors that independently influenced the tablet properties. Furthermore, the properties of tablets containing drug pellets barrier-coated with an aqueous polymer dispersion were also found to depend on the coating thickness and the compaction pressure.</p><p>When compacting pellets barrier-coated with a solvent-based polymer solution without incorporating excipient particles in the tablet formulation, a high pellet porosity was advantageous to preserve the original drug release profile, even though highly porous pellets became more densified and deformed than pellets of lower porosity.</p><p>The influence of the properties of excipient particles on the deformation<b> </b>of the reservoir pellets was also studied and, although the amount of flattening of the pellets was only slightly affected, changes in the pellet shape (irregularity) with alterations in the porosity and size of the excipient particles were more substantial. In contrast, the properties of the excipient particles did not affect the pellet densification.</p><p>The solvent-based coating used was able to adapt to the changes in volume and shape that the pellets underwent during compaction. The coating structure appears to be changed by compaction and it is proposed that the final structure of the coating is the net effect of two parallel processes, one reducing and one prolonging the transport time of the drug across the coating. Thus, the drug release could be maintained or even prolonged after compaction, despite extensive structural changes of the reservoir pellets.</p>
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Pour, Shahid Saeed Abadi Parisa. "Mechanical behavior of carbon nanotube forests under compressive loading." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47699.
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Carbon nanotube (CNT) forests are an important class of nanomaterials with many potential applications due to their unique properties such as mechanical compliance, thermal and electrical conductance, etc. Their deformation and failure in compression loading is critical in any application involving contact because the deformation changes the nature of the contact and thus impacts the transfer of load, heat, and charge carriers across the interface. The micro- and nano-structure of the CNT forest can vary along their height and from sample to sample due to different growth parameters. The morphology of CNTs and their interaction contribute to their mechanical behavior with change of load distribution in the CNT forest. However, the relationship is complicated due to involvement of many factors such as density, orientation, and entanglement of CNTs. None of these effects, however, are well understood. This dissertation aims to advance the knowledge of the structure-property relation in CNT forests and find methodologies for tuning their mechanical behavior. The mechanical behavior of CNT forests grown with different methodologies is studied. Furthermore, the effects of coating and wetting of CNT forests are investigated as methods to tailor the degree of interaction between CNTs. In situ micro-indentation of uncoated CNT forests with distinct growth-induced structures are performed to elucidate the effects of change of morphology along the height of CNT forests on their deformation mechanism. CNT aerial density and tortuosity are found to dictate the location of incipient deformation along height of CNT forests. Macro-compression testing of uncoated CNT forests reveals mechanical failure of CNT forests by delamination at the CNT-growth substrate. Tensile loading of CNT roots due to post-buckling bending of CNTs is proposed to be the cause of this failure and simple bending theory is shown to estimate the failure load to be on the same order of magnitude as experimental measurements. Furthermore, delamination is observed to occur in the in situ micro-indentation of CNT forests coated with aluminum on the top surface, which demonstrates the role of the mechanical constraints within the CNT forest in the occurrence of delamination at the CNT-substrate interface. In addition, this dissertation explores the mechanical behavior of CNT forests coated conformally (from top to bottom) with alumina by atomic layer deposition. In situ micro-indentation testing demonstrates that the deformation mechanism of CNT forests does not change with a thin coating (2 nm) but does change with a sufficiently thick coating (10 nm) that causes fracturing of the hybrid nanotubes. Ex situ flat punch and Berkovich indentations reveal an increase in stiffness of the CNT forests that are in range with those predicted by compression and bending theories. An increase in the recoverability of the CNTs is also detected. Finally, solvent infiltration is proposed as a method of decreasing stiffness of CNT forests and changing the deformation mechanism from local to global deformations (i.e., buckling in the entire height). Presence of solvents between CNTs decreases the van der Waals forces between them and produces CNT forests with lower stiffness. The results demonstrate the effect of interaction between CNTs on the mechanical behavior. This dissertation reveals important information on the mechanical behavior of CNT forests as it relates to CNT morphology and tube-to-tube interactions. In addition, it provides a framework for future systematic experimental and theoretical investigations of the structure-property relationship in CNT forests, as well as a framework for tuning the properties of CNT forests for diverse applications.
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Alencar, Rodrigo Gomes de. "Desenvolvimento de comprimidos contendo pellets revestidos para liberação cólon específica de cetoprofeno." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4020.
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Previous issue date: 2014-04-25<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Ketoprofen is a nonsteroidal anti-inflammatory drug used for the treatment of
mild to moderate pain in chronic inflammatory conditions. Due to its superior
potency ketoprofen can be used in the treatment of inflammatory bowel disease
(IBD). The treatment of IBD becomes safer and more effective when the drug is
incorporated into colon-specific drug delivery systems. Pellets are
multiparticulate solid dosage forms extensively investigated as colon-specific
drug delivery systems. Pellets can be introduced into capsules or compressed
into tablets. The industrial production of tablets containing pellets has several
advantages when compared to the production of capsules. However, the
compression of the pellets should not affect the release of the drug and the
tablets should quickly disintegrate following administration. Therefore, the aim
of this study was to develop tablets containing ketoprofen coated pellets for
colon-specific drug release. For this, pellets were produced by extrusion and
spheronization technique containing 40% (w / w) ketoprofen. Ketoprofen pellets
obtained were coated with two different pH - dependent polymers derived from
methacrylic acid (Opadry
®
k 94 or Eudragit
®
FS 30D) with weight gains of 10 or
20% (w / w). The coated pellets were then compressed under different pellets’
amounts and different compression forces. An extra- granular mixture of lactose
and microcrystalline cellulose was used as compression aid. The in vitro
release of ketoprofen from the systems obtained was evaluated in Bio Dis
®
apparatus. The morphological and physical properties of pellets and tablets
were assessed. The Eudragit
®
FS 30 D coated pellets with weight gains of 10 or
20% showed higher efficiency of colon-specific delivery (94 %), however, the
drug was released slowly and incompletely in conditions mimicking the pH of
the colonic region. After compression of the pellets, the efficiency of colon –
specific drug delivery was lowered after compression (between 20% and 61%,
depending on the formulation). The lowest decrease of colon specific efficiency
was observed in formulations containing lower amount of pellets, which also
produced disintegrating matrices with potential for use in the topical treatment of
IBD.<br>O cetoprofeno é um antiinflamatório não esteroidal usado para o tratamento de
dores leves a moderadas, em condições inflamatórias crônicas. Devido a sua
elevada potência antiinflamatória, o cetoprofeno pode ser aproveitado no
tratamento das doenças inflamatórias intestinais (DII). O tratamento das DII se
torna mais seguro e eficaz quando o fármaco é incorporado em sistemas de
liberação cólon-específica. Pellets são formas farmacêuticas multiparticuladas
bastante investigadas como sistemas de liberação cólon-específica. Após sua
produção, os pellets podem ser inseridos em cápsulas ou comprimidos. A
produção industrial de comprimidos contendo pellets apresenta inúmeras
vantagens quando comparada ao processo de enchimento de cápsulas. No
entanto, a compressão dos pellets não deve afetar as características de
liberação do fármaco e os comprimidos formados devem se desintegrar
rapidamente. Dessa forma, o objetivo deste trabalho foi desenvolver
comprimidos contendo pellets revestidos para liberação cólon-específica de
cetoprofeno. Para tanto, foram produzidos pellets contendo 40% (p/p) de
cetoprofeno e celulose microcristalina pela técnica de extrusão e
esferonização. Os pellets de cetoprofeno obtidos foram revestidos com dois
diferentes polímeros pH-dependentes, ambos derivados do ácido metacrílico
(Opadry
®
94 k ou Eudragit
®
FS 30) com ganhos de massa 10 ou 20% (p/p). Os
pellets revestidos foram então comprimidos com diferentes cargas de pellets e
submetidos a diferentes forças de compressão, utilizando como adjuvante
extra-pellets uma mistura granulada de lactose e celulose microcristalina. A
liberação in vitro do cetoprofeno a partir das formas farmacêuticas obtidas foi
avaliada em dissolutor Bio Dis aparato III. As caracterizações morfológicas e
físicas dos pellets e comprimidos foram conduzidas. Os pellets obtidos por
revestimento com Eudragit
®
FS 30 D, com ganhos de massa de 10 ou 20%,
mostraram elevada eficiência de liberação cólon-específica in vitro (até 94%),
no entanto, o fármaco foi liberado de forma lenta e incompleta em meio com pH
similar ao encontrado na região colônica. Após a compressão dos pellets, os
valores de eficiência de liberação cólon-específica sofreram reduções entre
20% e 61%. A menor diminuição da eficiência de liberação cólon-específica foi
observada nas formulações contendo a menor carga de pellets, as quais deram
origem à matrizes desintegráveis com potencial para utilização no tratamento
tópico das DII.
9
Benhadia, Abrehem M. A. "Evaluation of the critical parameters and polymeric coat performance in compressed multiparticulate systems." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/17459.
Full textAbstract:
Compression of coated pellets is a practical alternative to capsule filling. The
current practice is to add cushioning agents to minimize the stress on the
coated pellets. Cushioning agents however add bulkiness and reduce the
overall drug loading capacity. In this study, we investigated the performance
of compressed coated pellets with no cushioning agent to evaluate the
feasibility of predicting the coat behaviour using thermo-mechanical and
rheological analysis techniques. Different coating formulations were made of
ethyl cellulose (EC) as a coating polymer and two different kinds of additives
were incorporated into the polymeric coating solution. Triethyl Citrate (TEC)
and Polyethylene glycol 400(PEG400) were used as plasticizers at different
levels to the coating formulations (10%, 20%, 30%). Thermal, mechanical
and rheological measurements of the coating film formulations were
achieved to investigate the effect of plasticizers. Thermal gravimetric
analysis results (TGA) showed higher residual moisture content in films
plasticised with PEG 400 compared to their TEC counterparts. Differential
Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA) and
Parallel Plate Shear Rheometer (PPSR) were used to study the influence of
the level and type of plasticisers incorporated in coating film formulation on
the performance of the coating film. In this study, both DSC and DMA were used to investigate the Tg for each film coating formulation in order to
evaluate the effect of the additives. In general DMA results for the Tg value
of the films were always higher by 10-20% than those measured by the DSC.
Furthermore, clamp size and the frequency of the oscillation have an
influence on the evaluation of Tg. Complex viscosity for different coating film
formulations revealed that the shear hinning gradient changes with
temperature and plasticiser type and concentration. The value of complex
viscosity from DMA and PPSR exhibits power law behaviour. The rheological
moduli were indirectly affected by the level of plasticiser. There was a
discrepancy between the complex viscosity results obtained from both DMA
and PPSR at similar temperature but they follow the same trend. The non
plasticized polymer showed a 10 time higher complex viscosity values when
measured by DMA over that measured by PPSR. The difference was smaller
in plasticized films but it was not consistent. Therefore a consistent
coefficient to correlate the DMA and PPSR couldn’t be accurately determined
Coated pellets were compressed and key process parameters were
evaluated. The obtained results revealed that the coating thickness has a
significant effect on the release profile of the final products. It was found that
by increasing the coating film thickness, the percentage released decreased.
Also the compression force has lower influence on the drug release profile,
while the dwell time has very low effect on the percentage release from the
final products. Optimum release profile was obtained at a coating level of 5.5%
w/w and a compression force of 4700N
In conclusion, the elasticity of the plasticised EC films in this study meant
that the internal stress is not dissipated during compression and the dwell time range that was used in this experiment. Increasing the thickness
therefore was necessary to enhance the strength of the film and avoid
cracking. The mechanical and rheological profiling was helpful therefore to
understand the behaviour of the coated pellets and predict the film properties
at various steps of the process of coating and compression (i.e., various
shear rate regimes). Experimental design approach to studying the key
process and formulation parameters helped identify the optimum values for
the process.
10
Liu, Junling. "Plasma spray deposition of silicon nitride composite coatings." Thesis, London South Bank University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288111.
Full textBooks on the topic "Compression coating"
1
Cruse, Thomas A. Mechanical testing of advanced coating system: Final report. Southwest Research Institute, 1990.
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2
K, Kokula Krishna Hari, and K. Saravanan, eds. Performance (COP) Analysis of a Vapour Compression Refrigeration System component with Nano Coating. Association of Scientists, Developers and Faculties, 2016.
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3
United States. National Aeronautics and Space Administration., ed. MATE program.: Erosion resistant compressor airfoil coating. National Aeronautics and Space Administration, 1987.
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4
Melvin, Freling, Friedrich L. A, and Lewis Research Center, eds. Materials for Advanced Turbine Engines (MATE): Project 4--erosion resistant compressor airfoil coating. National Aeronautics and Space Administration, 1987.
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5
Wake, L. V. Investigation of coating performance and corrosion of compressor components in the TF30-P-3 engine of F111C aircraft. Materials Research Laboratories, 1986.
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6
United States. National Aeronautics and Space Administration., ed. Task 4 supporting technology. Rockwell Aerospace, Space Systems Division, 1995.
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7
Han, Chang Dae. Rheology and Processing of Polymeric Materials: Volume 2: Polymer Processing. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195187830.001.0001.
Full textAbstract:
Volume 2 presents the fundamental principles related to polymer processign operations including the processing of thermoplastic polymers and thermosets. The objective of this volume is not to provide recipies that necessarily guarantee better product quality. Rather, emphasis is placed on presenting a fundamental approach to effectively analyze processing operations. The specific polymer processing operations for thermoplastics include plasticating single-screw extrusion, morphology evolution during compounding of polymer blends, compatibilization of immiscible polymer blends, wire coating extrusion, fiber spinning, tubular film blowing, coextrusion, and thermoplastic foam extrusion. The specific polymer processing operations for thermosets include reaction injection molding, pultrusion of fiber-reinforced thermosets, and compression molding of thermoset composites.
8
Numerical Prediction of the Impact of Non-Uniform Leading Edge Coatings On the Aerodynamic Performance of Compressor Airfoils. Storming Media, 2004.
Find full textBook chapters on the topic "Compression coating"
1
Balokhonov, Ruslan R., and Varvara A. Romanova. "Microstructure-Based Computational Analysis of Deformation and Fracture in Composite and Coated Materials Across Multiple Spatial Scales." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_17.
Full textAbstract:
AbstractA multiscale analysis is performed to investigate deformation and fracture in the aluminum-alumina composite and steel with a boride coating as an example. Model microstructure of the composite materials with irregular geometry of the matrix-particle and substrate-coating interfaces correspondent to the experimentally observed microstructure is taken into account explicitly as initial conditions of the boundary value problem that allows introducing multiple spatial scales. The problem in a plane strain formulation is solved numerically by the finite-difference method. Physically-based constitutive models are developed to describe isotropic strain hardening, strain rate and temperature effects, Luders band propagation and jerky flow, and fracture. Local regions experiencing bulk tension are found to occur during compression that control cracking of composites. Interrelated plastic strain localization in the steel substrate and aluminum matrix and crack origination and growth in the ceramic coating and particles are shown to depend on the strain rate, particle size and arrangement, as well as on the loading direction: tension or compression.
2
Pazhayattil, Ajay Babu, Sanjay Sharma, Joe Paul Philip, Michelle Gischewski-Silva, and Marzena Ingram. "Scaling-Up of Solid Orals: Granulation, Drying, Size Reduction, Blending, Compression, and Coating Technologies." In AAPS Introductions in the Pharmaceutical Sciences. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-32192-4_5.
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3
Bhuyan, Saswat Kumar, and Debajit Mohapatra. "An Investigation on Surface Ceramic Coating of Compression Ignition Engine Piston Using Finite Element Analysis." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4795-3_42.
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4
Biermann, Horst, Anja Weidner, and Xian Wu. "High-Temperature Strength and Form Stability of Compact and Cellular Carbon-Bonded Alumina." In Multifunctional Ceramic Filter Systems for Metal Melt Filtration. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-40930-1_22.
Full textAbstract:
AbstractTo prove the applicability of carbon-bonded refractories on basis of Al2O3-C for the filtration of metal melts, their mechanical properties such as compression and bending strength were investigated at elevated temperatures up to 1500 °C. The tests have been carried out on compact specimens and on real filter structures without and with functional coatings. Fracture mechanical tests were performed at room temperature and 1400 °C. In a further approach, the residual strength after contact of the filters with molten steel was determined at elevated temperatures. In addition, a new environmentally friendly binder system based on tannin and lactose has been evaluated.
5
Benedetti, Andrea. "Diagonal Compression Behaviour of Masonry Walls Reinforced with FRM Coatings." In RILEM Bookseries. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-99441-3_51.
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Coutinho, Nicole Thomaz Aquino Drumond, David Coverdale Rangel Velasco, Afonso Rangel Garcez de Azevedo, Carlos Maurício Fontes Vieira, Felipe Perissé Duarte Lopes, and Geovana Carla Girondi Delaqua. "Compressive Strength of Composites Reinforced with Casuarina Particulate for Protective Coatings." In The Minerals, Metals & Materials Series. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-81190-6_12.
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7
Azevedo, A. C., João M. P. Q. Delgado, and A. S. Guimarães. "Influence of Reinforced Mortar Coatings on the Compressive Strength of Masonry Prisms." In Advanced Structured Materials. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91062-8_2.
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Delgado, J. M. P. Q., Ana Sofia Guimarães, António C. Azevedo, Romilde A. Oliveira, Fernando A. N. Silva, and Carlos W. A. P. Sobrinho. "Influence of Reinforced Mortar Coatings on the Compressive Strength of Masonry Prisms." In Structural Performance of Masonry Elements. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-03270-8_3.
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9
Barone, Sandro, Paolo Neri, Alessandro Paoli, Armando Viviano Razionale, and Francesco Tamburrino. "Effects of Coating Post-processing on the Compressive Properties of Strut-and-Node-Based FDM Lattice Structures." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91234-5_45.
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Xue, Jing, Min Huang, Jun Yi, and Xuejun Liu. "Reliability modeling and optimization of the spray process for seal coatings on the aero-engine compressor casing." In Risk, Reliability and Safety: Innovating Theory and Practice. CRC Press, 2016. http://dx.doi.org/10.1201/9781315374987-261.
Full textConference papers on the topic "Compression coating"
1
Marquardt, Tom, Michael Irmer, Andreas Momber, Nikolai Glück, and Wilko Flügge. "Corrosion Protection Performance of Mechanically Damaged OWEA Coating Systems." In Coatings+ 2019. SSPC, 2019. https://doi.org/10.5006/s2019-00035.
Full textAbstract:
Abstract As part of the national research project OWS-MV (Offshore Wind Solutions-Mecklenburg- Vorpommern), investigations were carried out to assess effects of mechanical stresses on the corrosion protection performance of coatings for offshore wind turbines (OWEA). In order to simulate typical damage mechanisms during transport and assembly of OWEA, compression, impact and abrasion tests and corrosion resistance tests were performed on laboratory scales. In order to categorize the intensity of damages, the mechanical tests were carried out on three load levels. Statistical methods were applied to assess and evaluate the performance of 15 different coating systems.
2
Knudsen, Ole Øystein, Astrid Bjørgum, Tone Frydenberg, and Roy Johnsen. "Development of Internal Stress in Organic Coatings During Curing and Exposure." In CORROSION 2006. NACE International, 2006. https://doi.org/10.5006/c2006-06028.
Full textAbstract:
Abstract Internal stress in 21 different organic coatings has been measured by the beam deflection method. The internal stress was measured both after curing, after exposure in distilled water and after heating to 60°C. For most of the coatings investigated the measured internal stress was quite low and well below the level where cracking may become a problem. After exposure in distilled water the internal stress in most of the epoxy coatings increased significantly, but for most of the coatings the stress level was still quite low. For one of the epoxy coatings internal stress was calculated to be above 8 MPa after the water exposure. This is below the tensile strength of the coating, but with additional strains on the coating during exposure, cracking may become a problem. Topcoats of different generic types were tested, but none of the products showed significant internal stress, even after exposure in water. In fact, most of these products had developed negative internal stress after exposure, i.e. an internal compression. Internal compression was only found with binders that contain functional groups that are reactive with water. Leaching of components from the films may have contributed to the stress increase after exposure, but there was no correlation between level of stress and material loss by leaching.
3
Kumar, Deepak, Bruce A. Pint, Sebastien Dryepondt, et al. "Performance of Diffusion Aluminide Coatings Applied on Alloy CF8C-Plus at 800°C." In CORROSION 2011. NACE International, 2011. https://doi.org/10.5006/c2011-11197.
Full textAbstract:
Abstract High performance cast stainless steel, CF8C-Plus, is a low cost alloy with prospective applications ranging from covers and casings of small and medium size gas turbines to turbocharger housing and manifolds in internal combustion engines. Diffusion aluminide coatings were applied on this alloy as a potential strategy for improved oxidation resistance, particularly in wet air and steam. In this paper the performance of the aluminide coatings evaluated by cyclic oxidation experiments in air containing 10 vol.% H2O at 800°C and conventional tension-compression low-cycle-fatigue tests in air at 800°C with a strain range of 0.5% is presented. The results show that specimens coated by a chemical vapor deposition process provide better oxidation resistance than those coated by an Al-slurry coating process. The application of a coating by pack cementation reduced the fatigue life by 15%.
4
Rodríguez, Valmore, Elías Perozo, and Elena Alvarez. "Coating Aplication and Evaluation for Heavy Wall Thickness, Temperature and Pressure Pipeline." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97577.
Full textAbstract:
Abstract A Venezuelan oil company is developing a project for high pressure gas injection for oil recovery. This project has a compression plant to increase the gas pressure from 1200 to 9000 psi. Due to the high gas pressure (9000 psi) and high temperature (90°C), a carbon steel API 5L-X60 with 2.5 in thickness pipe has been selected. The gas is transported from the compression plant to the injection well. This type of pipeline is unique in the world and in our knowledge no one has applied and evaluated external coating for this combination of heavy wall thickness, pressure and temperature pipeline Dual fusion bonded epoxy was selected as main coating, combined with high temperature sleeves for the joints. Several parameters were considered in the selection of the coating: high temperature, wall thickness, application condition, heat during the welding process and coating performance in the lab. The large amount of heat accumulated during the application, due to the thick wall, requires a modification of coating application parameters, as well as the cooling condition. The evaluation of the coating was performed with a specially designed test for high temperatures. The laboratory results (impact resistance, degree of curing, cathodic disbonding, adhesion and hot water immersion) indicate that the application condition used was good to obtain a product under specification.
5
Guo, Shu, K. Him Lo, and Benjamin T. A. Chang. "Non-Osmotic Blistering Mechanism in FBE Coatings." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01298.
Full textAbstract:
Abstract One of the most frequently observed failure modes in FBE coatings on buried pipelines is the development of blisters, which compromise the function of the coating to provide corrosion protection to the steel substrate. Osmotic blistering due to surface salt contamination is commonly used to explain the development of blisters in FBE coatings in water immersion. However, there are other blistering mechanisms in FBE coatings which are non-osmotic, such as the cathodic blistering, electroendosmotic blistering, and swelling blistering. Swelling blistering in FBE coating is due to water absorption in the coating which in turn induces compressive stresses in the coating and causes the coating to blister (or buckle) at locations of delamination in the FBE-steel interface. The purpose of this paper is to study the non-osmotic swelling blistering mechanism and to relate the development of blisters to the swelling of FBE coatings with water absorption. The results of the study could be used to guide the development of more appropriate coating products to minimize the blistering problems and to assist the end users to select proper coating materials and surface preparation for their specific applications.
6
Sonoda, T., T. Kuwashima, T. Saito, et al. "Super Hard WC Cermet Coating by Low Pressure Cold Spray Based on Optimization of Powder Properties." In ITSC2013, edited by R. S. Lima, A. Agarwal, M. M. Hyland, et al. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.itsc2013p0241.
Full textAbstract:
Abstract In this work, tungsten carbide coatings are deposited by low-pressure cold spraying in order to assess the influence of powder compressive strength and binder materials on coating properties. Powder compressive strength was measured with a micro-compression tester, and cobalt and FeCr in different proportions were used as the metal binder. It was found that compressive strength affects coating hardness as well as deposition efficiency and that the optimum value for deposition efficiency is about 200 MPa. The results also indicate that dense coatings can be produced with either binder material, although coatings with an FeCr binder are the hardest.
7
Suman, Michele, Fabio Frassetto, Piergiorgio Nicolosi, and Maria-Guglielmina Pelizzo. "XUV multilayer coating design for attosecond pulse compression." In Frontiers in Optics. OSA, 2006. http://dx.doi.org/10.1364/fio.2006.jwd32.
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Bouaricha, S., J. G. Legoux, and P. Marcoux. "HVOF Coating Characterization by Acoustic Emission Using Four-Point Bending Test." In ITSC2003, edited by Basil R. Marple and Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p0809.
Full textAbstract:
Abstract Four-point bend test using acoustic emission (AE) was used to compare coating properties under mechanical solicitation, mainly the toughness and the spalling behaviour. Coatings are made from the same material; the 2005NS (WC-17Co), sprayed with an HVOF gun at various spray parameters. Coatings deposited on thin rectangular substrates were tested with the coating bent in tension and in compression. AE features like the event number, energy per event and cumulative energy were used to assess the damage in the coatings. The results are analyzed in relation with the coating microstructure.
9
Ko, Seunghyun, Elliott J. Straus, and Jose M. Castro. "Chemorheology of in-mold coating for compression molded SMC applications." In PROCEEDINGS OF PPS-30: The 30th International Conference of the Polymer Processing Society – Conference Papers. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4918464.
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Aldio, Rieza Zulrian, Dedikarni, and Deni Restu Fauzi. "Graphite coating of aluminum bipolar plate using compression molding method." In THE 8TH INTERNATIONAL CONFERENCE ON TECHNOLOGY AND VOCATIONAL TEACHERS 2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0216415.
Full textReports on the topic "Compression coating"
1
Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski, and Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40683.
Full textAbstract:
A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.
2
Arment, Tyrell W. The Effects of Thermal Barrier Coating, Common-Rail Injection, and Reduced Compression Ratio on the Efficiency of Single-Cylinder Diesel Engines. Defense Technical Information Center, 2010. http://dx.doi.org/10.21236/ada549041.
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3
Fessler. PR-313-063527-R01 Define Operating Conditions in Which No SCC Exists. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010814.
Full textAbstract:
A survey was conducted of gas and liquid pipeline operators to determine if there were any kinds of coating, surface preparation, design pressure, or years of construction that could be identified with conditions under which no stress-corrosion cracking (SCC) has occurred. The only condition that was identified was pipe coated with fusion-bonded epoxy (FBE) following a thorough grit blast. The probability for high-pH SCC was found to be low at distances greater than 20 miles (32 km) downstream of compressor stations, under asphalt coatings, and in liquid pipelines and at stresses below 60 % of specified minimum yield strength (SMYS). The probability of near-neutral pH SCC was found to be low under coal tar coatings and at stresses below 60 % SMYS. Trends for liquid pipelines differed from those for gas pipelines, possibly because corrosion fatigue cannot be differentiated from SCC, and corrosion fatigue is much less likely to occur on gas pipelines than on liquid pipelines.
4
Kawamura, Yoshinori, Souichiro Nishino, Kunio Ohya, and Keiji Yokose. Damage Evaluation for Coatings of Press Forming Die Under Compression. SAE International, 2005. http://dx.doi.org/10.4271/2005-08-0088.
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Bernstein. L51797 Life Management of the RB211-24C Gas Turbine. Pipeline Research Council International, Inc. (PRCI), 1998. http://dx.doi.org/10.55274/r0010427.
Full textAbstract:
Gas turbine engines are in common use in the Gas Pipeline industry to drive gas compressors in compression facilities. One of the major cost factors in the operation of these turbines is the repair or replacement of the hot section components. Technology that can extend the operational life of these components, or increase the ability to repair these components, is of immediate financial and operational benefit to members of PRCI. The RB211 gas turbine engine is commonly used in compression facilities. The life of the model 24C HP turbine blades is currently inadequate, leading to early replacement at a cost of approximately $300,000 per set. Actual life is not known by the users (or the OEM) and existing estimates are unreliable. Since users do not have adequate means to predict the point at which the blades must be retired, this study of the RB211-24C HP blade life factors was initiated to provide users with guidance for blade maintenance. The objectives of the project were to define the life factors affecting the repair and replacement decisions for the RB211-24C HP turbine blades. This includes determining the operative degradation modes of these turbine blades; the expected life of these blades as a function of engine operation; the potential to repair these blades, and the potential to obtain additional life and durability of the blades by the use of more protective coatings.