Log in

Relevant bibliographies by topics / Rheometal™ process / Journal articles

To see the other types of publications on this topic, follow the link: Rheometal™ process.

Journal articles on the topic 'Rheometal™ process'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Rheometal™ process.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Östklint, Mattias, and Magnus Wessen. "Microstructure Characteristics and Semi-Solid Slurry Formation in Binary Mg-Al Alloys Produced by the RheoMetal Process." Solid State Phenomena 192-193 (October 2012): 482–87. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.482.

Full text

Abstract:

The RheoMetal process, previously also called the Rapid Slurry Forming process (“Rapid S”) or RSF process, is a novel method to produce high quality, cost effective, semi-solid magnesium slurries for component casting. The RheoMetal process uses an Enthalpy Exchange Material (EEM) as internal cooling to produce the slurry. Typical critical process parameters in the RheoMetal process are alloy content, stirring speed, superheat and EEM to melt ratio. In this study the effects of EEM to melt ratio and superheat on the slurry characteristics was examined for binary Mg-Al alloys in the range 5.8 - 11.2 wt % Al. Samples were quenched after slurry preparation and the microstructure was studied with respect to solid fraction and -Al grain diameter. The solid fraction increased with an increasing EEM to melt ratio for all three Al-contents investigated. Further, it was found that the solid fraction as well as the grain diameter decreased with increasing aluminium content (at constant EEM to weight ratio).

APA, Harvard, Vancouver, ISO, and other styles

2

Gupta, Robin, Ashok Sharma, Upender Pandel, and Lorenz Ratke. "Wear analysis of A356 alloy cast through rheometal process." Materials Research Express 4, no. 4 (April 12, 2017): 046503. http://dx.doi.org/10.1088/2053-1591/aa680c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Payandeh, Mostafa, Anders E. W. Jarfors, and Magnus Wessen. "Effect of Superheat on Melting Rate of EEM of Al Alloys during Stirring Using the RheoMetal Process." Solid State Phenomena 192-193 (October 2012): 392–97. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.392.

Full text

Abstract:

The RheoMetal process (previously called the Rapid S- and RSF- process) is a novel method to produce cost effective, high quality, semisolid slurries for component casting. The RheoMetal process uses an Enthalpy Exchange Material (EEM) as cooling agent to absorb heat and produce a slurry. Critical process parameters to create a slurry by robust melting of the EEM are alloy content, stirring speed, EEM to melt ratio, EEM temperature, EEM microstructural characteristics and melt superheat. In this paper, the melting sequence and melting rate of the EEM was studied experimentally. The effect of EEM composition, as well as superheat, on evolution of shape and dimension of the EEM during stirring was investigated. Initial material freezing onto the EEM was observed, followed by a stationary phase with subsequent gradual melting of the EEM. It was shown that the characteristics of freeze-on layer were strongly correlated to melt superheat, EEM temperature, as well as material composition, hence also has significant influence on the melting sequence.

APA, Harvard, Vancouver, ISO, and other styles

4

Granath, O., M. Wessén, and H. Cao. "Determining effect of slurry process parameters on semisolid A356 alloy microstructures produced by RheoMetal process." International Journal of Cast Metals Research 21, no. 5 (October 2008): 349–56. http://dx.doi.org/10.1179/136404608x320706.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Jarfors, Anders E. W., Jin Chuan Zheng, Liang Chen, and Jie Yang. "Recent Advances in Commercial Application of the Rheometal Process in China and Europe." Solid State Phenomena 285 (January 2019): 405–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.405.

Full text

Abstract:

Recent advances in rheocasting have resulted in significant expansion in the types of products currently in full commercial production. The current paper gives an overview of components in production in Europe and in China produced using the RheoMetalTM process, that has taken the lead in a strong drive towards new heavy-duty applications made from aluminium alloys. In China, the dominating applications are found in the telecom industry. The trend in Europe is more towards marine and automotive applications commonly in fatigue loaded applications. The reason for the choice of rheocasting for complicated shape thin-walled electronics components with requirements is dominated by process yield and by the ability to improve thermal conductivity. The heavy-duty truck chassis thick walled components target weight reduction through design and to sustain fatigue load normally requiring forged components. Common in all applications are seen in production yield, reduced tool wear and reduction of die soldering.

APA, Harvard, Vancouver, ISO, and other styles

6

Gupta, Robin, Ashok Sharma, Upender Pandel, and Lorenz Ratke. "Effect of stirring speed on microstructure of A356 alloy cast through rheometal process." International Journal of Materials Research 108, no. 8 (August 11, 2017): 648–55. http://dx.doi.org/10.3139/146.111521.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Payandeh, M., Mohsen Haddad Sabzevar, A. E. W. Jarfors, and M. Wessén. "Solidification and Re-melting Phenomena During Slurry Preparation Using the RheoMetal™ Process." Metallurgical and Materials Transactions B 48, no. 6 (August 21, 2017): 2836–48. http://dx.doi.org/10.1007/s11663-017-1061-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Cao, H., M. Wessén, and O. Granath. "Effect of injection velocity on porosity formation in rheocast Al component using RheoMetal process." International Journal of Cast Metals Research 23, no. 3 (June 2010): 158–63. http://dx.doi.org/10.1179/136404609x12565676328682.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Jarfors, Anders E. W. "A Comparison Between Semisolid Casting Methods for Aluminium Alloys." Metals 10, no. 10 (October 13, 2020): 1368. http://dx.doi.org/10.3390/met10101368.

Full text

Abstract:

Semisolid casting of aluminium alloys is growing. For magnesium alloys, Thixomoulding became the dominant process around the world. For aluminium processing, the situation is different as semisolid processing of aluminium is more technically challenging than for magnesium. Today three processes are leading the process implementation, The Gas-Induced Superheated-Slurry (GISS) method, the RheoMetal process and the Swirling Enthalpy Equilibration Device (SEED) process. These processes have all strengths and weaknesses and will fit a particular range of applications. The current paper aims at looking at the strengths and weaknesses of the processes to identify product types and niche applications for each process based on current applications and development directions taken for these processes.

APA, Harvard, Vancouver, ISO, and other styles

10

Cao, Hai Ping, Olof Granath, and Magnus Wessen. "The Effect of Si Content on the Mechanical Properties of Rheocast Al Components Using the RHEOMETAL^TM Process." Solid State Phenomena 141-143 (July 2008): 779–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.779.

Full text

Abstract:

The RHEOMETALTM process is a commercially used semi-solid process for production of high integrity cast components. The process differs from most other semi-solid casting processes in that temperature control is not necessary during processing and large amount of slurry with required solid fraction can be quickly produced. The simplicity of this process has led to a large commercial interest during the last year. This work is based on an investigation regarding the variation of as-cast mechanical properties for secondary Al-Si based alloys (~2.5 % Cu) with a Si content varying from 4.55 to 8.90 % using the RHEOMETALTM process. The purpose was to find the most suitable Al-Si alloy for rheocasting, in comparison with the common HPDC-alloy A380 (EN-AC46000). It was found that lower Si containing alloys exhibited better elongation but slightly lower yield strength. The alloy containing 5.39 wt% Si showed the highest ultimate tensile strength in this investigation. The lower Si containing alloys also demonstrated better feedability in the rheocasting process, which is contrary to what normally is found for normal liquid casting processes. Based on the results in this investigation it is recommended to use an alloy containing about 5-7 wt% Si for rheocasting purposes.

APA, Harvard, Vancouver, ISO, and other styles

11

Santos, Jorge, Anders E. W. Jarfors, and Arne K. Dahle. "Variation of Properties in the Cross-Section of Semi-Solid Al-7Si-0.3Mg Castings." Solid State Phenomena 285 (January 2019): 81–86. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.81.

Full text

Abstract:

In semi-solid casting, a slurry consisting of primary α-Al crystals and liquid is injected into the die cavity. The solidification in the die-cavity occurs by the growth of the primary α-Al crystals formed during slurry preparation and in the shot sleeve, nucleation and growth of in-cavity solidified crystals and ends with the eutectic reaction. During solidification in the die cavity, the cooling rate near the die wall is higher in comparison to the centre of the casting, particularly for thick-walled castings. The solidification conditions for the slurry α-Al crystals that are closer to the die wall can be very different compared to the slurry α-Al crystals located at the casting centre. This can result in different solute concentration in the interior of the α-Al globules in different regions of the semi-solid casting cross-section and consequently, different response to heat treatament. The RheoMetal™ process was used to produce thick-walled semi-solid castings. Semi-solid castings in the as-cast and T6 conditions were investigated. Indentation tests for hardness measurements in the nano-range were performed in the interior of α-Al globules near the surface and at the casting cross-section centre. The hardness variation across the casting cross-section was evaluated by low-force Vickers hardness. The castings in the as-cast condition showed more uniform properties in the cross-section compared to the T6 condition. Additionally, the results suggest that microsegregation in the interior of α-Al globules is very low in castings in the as-cast and T6 conditions.

APA, Harvard, Vancouver, ISO, and other styles

12

Dealy, J. M. "Challenges in process rheometry." Rheologica Acta 29, no. 6 (November 1990): 519–22. http://dx.doi.org/10.1007/bf01329297.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Wan Aziz, Wan Nor Suhaila, Shahrul Kadri Ayop, and Rosazley Ramly. "Temperature and Concentration Dependent Viscosity of Microcrystalline Cellulose in Water." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 80, no. 2 (February 21, 2021): 74–81. http://dx.doi.org/10.37934/arfmts.80.2.7481.

Full text

Abstract:

The viscosity of cellulose behaves differently and uniquely in various conditions. In this paper, we aim to report the viscosity measurement and related properties of low concentration of microcrystalline cellulose (MCC) in water using a magnetic bearing rheometer. Dynamic viscosities for MCC diluted in water at varying concentrations were measured using the standard rheometry technique. The viscosity of the MCC solution was found highly dependent on its concentration and the experiment temperature. This varieties behaviour and properties offers benefits to the current growing rapidly technology applications such as in food, pharmaceutical cosmetics and textile.

APA, Harvard, Vancouver, ISO, and other styles

14

Xie, Dong, Yang Zhao, Yuan Li, Anna Marie LaChance, Jinqing Lai, Luyi Sun, and Junjia Chen. "Rheological, Thermal, and Degradation Properties of PLA/PPG Blends." Materials 12, no. 21 (October 26, 2019): 3519. http://dx.doi.org/10.3390/ma12213519.

Full text

Abstract:

The work presented herein focuses on simulating the compounding process via a torque rheometer, as well as the relationship between the melt viscosity and the polymer molecular weight (MW). We aim to predict the plasticization of polylactic acid (PLA) using polypropylene glycol (PPG) with different MWs. The rheological properties of the PLA/PPG composites containing PPG with different MWs were systematically studied by capillary rheometry and torque rheometry. The initial degradation of PLA/PPG composites during melt processing was monitored in real time. The results indicate that PPG can significantly reduce the melt viscosity of PLA/PPG composites, leading to obvious pseudoplastic fluid behavior. The lower the MW of PPG, the lower the viscosity of the PLA/PPG composite. The addition of PPG was favorable for the degradation of PLA during processing, and the degradation degree of the composite materials increased as the MW of PPG was decreased.

APA, Harvard, Vancouver, ISO, and other styles

15

Strobelt, Jonas, Joerg Bauer, Marc Dreissigacker, Ole Hoelck, Tanja Braun, Karl-Friedrich Becker, Martin Schneider-Ramelow, and Klaus-Dieter Lang. "COMBINING ADVANTAGES OF RHEOMETRY AND INLINE VISCOMETRY FOR IMPROVED VISCOSITY MODELING." International Symposium on Microelectronics 2019, no. 1 (October 1, 2019): 000568–72. http://dx.doi.org/10.4071/2380-4505-2019.1.000568.

Full text

Abstract:

Abstract In microelectronic packaging, encapsulation by compression and transfer molding is a crucial process block to ensure device reliability. Material properties of encapsulants, highly filled systems of reactive epoxy molding compounds (EMC), strongly depend on process conditions in a complex manner and vary over time. Shear-thinning behavior, as well as time- and temperature-dependent conversion strongly impact the viscosity of the polymer melt. In all fields of application, such as automotive or IoT, demands towards miniaturization, lifetime and environmental conditions increase. Thus, detailed understanding of the complex material behavior is of vital importance. Typically, shear-thinning behavior of polymer melts is characterized using a conventional rheometer in oscillation mode under varying shear-rates and temperatures. Limitations of this approach are, that measurements at process temperature typically cannot be performed due to the high reactivity of the encapsulant at these temperatures (e.g. 175 °C for transfer molding). Therefore extrapolation to the correct temperature range is required. Furthermore, measurements in oscillation mode cannot necessarily be transferred to real process conditions, where a continuous flow is present. To overcome these limitations the inline viscometer can be used, a specially designed measurement tool for a transfer molding machine developed by Fico/Besi. The polymer melt is pressed through a narrow slit under known volumetric flow at process temperature. By measuring the pressure difference before and after the slit, the viscosity can be calculated. In order to better understand and also predict material behavior, inline viscosimetry is combined with rheometer measurements. This allows to maintain the advantages of conventional rheometry regarding material consumption and large shear-rate measuring range. At the same time, the inline approach provides relevant data under process conditions. The synthesis of both approaches yields a correction of the rheometer measurements, ultimately improving viscosity modeling and being an improved basis for process simulation.

APA, Harvard, Vancouver, ISO, and other styles

16

Leblanc, Jean L. "Investigating the Non-Linear Viscoelastic Behavior of Filled Rubber Compounds Through Fourier Transform Rheometry." Rubber Chemistry and Technology 78, no. 1 (March 1, 2005): 54–75. http://dx.doi.org/10.5254/1.3547873.

Full text

Abstract:

Abstract Fourier transform (FT) rheometry was used to investigate the non-linear viscoelastic behavior of a series of carbon black filled rubber compounds with various filler levels. Using a purposely modified commercial dynamic rheometer, i.e. the Rubber Process Analyzer RPA 2000® (Alpha Technologies), special strain sweep tests protocols were designed and performed in order to capture the actual strain and torque signals up to 500% deformation at constant frequency and temperature. FT yielded the main component and harmonics of strain and torque signals. Results show that the quality of the applied strain signal somewhat deteriorates with increasing stiffness of filled compounds, but remains excellent in the high strain region, where the non-linear viscoelastic response of the materials is investigated. Above a filler volume fraction of around 12–13%, tested materials no longer exhibit a linear viscoelastic response, at least in the strain window investigated, and the FT rheometry results are more complex than what was observed with pure gum samples. This means that most practical rubber compounds are intrinsically non-linear. By essence, FT rheometry is a valid technique for both the linear and the non-linear domains and, as shown, provides original information about complex polymer systems such as filled rubber compounds.

APA, Harvard, Vancouver, ISO, and other styles

17

Strobel, Moritz Elias, Milan Kracalik, and Sabine Hild. "In Situ Monitoring of the Curing of a Bisphenol-A Epoxy Resin by Raman-Spectroscopy and Rheology." Materials Science Forum 955 (May 2019): 92–97. http://dx.doi.org/10.4028/www.scientific.net/msf.955.92.

Full text

Abstract:

In this study the curing of an epoxy resin consisted of a diglycidyl ether of bisphenolA (DGEBA) resin and an aromatic Polyamine hardener was monitored combining a Raman-spectrometer and shear rheometry (Rheo-Raman). The set-up allow to carry out curing experiments at various temperatures (100, 120, 140 and 160 °C) where rheological measurements were performed using an oscillation rheometer and a plate-plate geometry while simultaneously Raman spectra were recorded. Raman-spectroscopy allows the determination of the reaction turnover and therefore the degree of cross-linking. Combined with the rheological data obtained, e.g. the gel point and the vitrification point, one can get a better insight in the processes occurring and the influence of different measurement parameters on the obtained rheological properties. Thus, the reaction turnover has been investigated at significant stages of the curing process.

APA, Harvard, Vancouver, ISO, and other styles

18

SUTHEERAWATTANANONDA, M., and E. D. BASTIAN. "MONITORING PROCESS CHEESE MELTABILITY USING DYNAMIC STRESS RHEOMETRY." Journal of Texture Studies 29, no. 2 (May 1998): 169–83. http://dx.doi.org/10.1111/j.1745-4603.1998.tb00162.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hernández-Rangel, Francisco J., María Z. Saavedra-Leos, Josefa Morales-Morales, Horacio Bautista-Santos, Vladimir A. Reyes-Herrera, José M. Rodríguez-Lelis, and Pedro Cruz-Alcantar. "Continuous Improvement Process in the Development of a Low-Cost Rotational Rheometer." Processes 8, no. 8 (August 3, 2020): 935. http://dx.doi.org/10.3390/pr8080935.

Full text

Abstract:

The rheological characterization of fluids using a rheometer is an essential task in food processing, materials, healthcare or even industrial engineering; in some cases, the high cost of a rheometer and the issues related to the possibility of developing both electrorheological and magnetorheological tests in the same instrument have to be overcome. With that in mind, this study designed and constructed a low-cost rotational rheometer with the capacity to adapt to electro- and magneto-rheological tests. The design team used the method of continuous improvement through Quality Function Deployment (QFD) and risk analysis tools such as Failure Mode and Effect Analysis (FMEA) and Finite Element Analysis (FEA). These analyses were prepared in order to meet the customer’s needs and engineering requirements. In addition to the above, a manufacturing control based on process sheets was used, leading to the construction of a functional rheometer with a cost of USD $1500.

APA, Harvard, Vancouver, ISO, and other styles

20

Cohu, Olivier, and Albert Magnin. "Rheometry of paints with regard to roll coating process." Journal of Rheology 39, no. 4 (July 1995): 767–85. http://dx.doi.org/10.1122/1.550656.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Sandu, Ionut Laurentiu, Razvan Rosculet, and Catalin Fetecau. "Rheological Properties of Thermoplastic Polyurethane/Multi-Walled Carbon Nanotube Nanocomposites." Key Engineering Materials 699 (July 2016): 18–24. http://dx.doi.org/10.4028/www.scientific.net/kem.699.18.

Full text

Abstract:

Carbon nanotubes offer the possibility of substantial improvements in the properties of polymer-based composites. However, adding carbon nanotubes increases the viscosity and makes the composites more difficult to process. Consequently, understanding the rheological behavior of nanocomposites is important from both the theoretical and industrial points of view. In the present work, rheological behavior of thermoplastic polyurethane filled with various amounts (1, 3 and 5 wt.%) of multi-walled carbon nanotubes was investigated by capillary rheometry. In this regard, the melt flow behavior of the nanocomposite was measured using a capillary rheometer with a die length-diameter ratio of 30:1, 20:1 and 10:1. In order to investigate the effect of temperature on viscosity, the tests were carried out in the temperature range of 180 to 210°C. The shear rate examined between 100 and 5000 s-1, cover the shear experienced during most polymer processing techniques. The Bagley and Weissenberg-Rabinowitsch correction was performed to determine the real viscosity of the nanocomposites; moreover, the Cross viscosity model coefficients were determined.

APA, Harvard, Vancouver, ISO, and other styles

22

Gómez-Jimenez., S., A. M. Becerra-Ferreiro., E. Jareño-Betancourt., and J. Vázquez-Penagos. "Phenomenological Modeling of the Apparent Viscosity as a Function of the Degree of Curing of an EPDM Elastomer." MRS Advances 5, no. 62 (2020): 3205–14. http://dx.doi.org/10.1557/adv.2020.426.

Full text

Abstract:

AbstractThe moving die rheometer technique (MDR) is used to measure the elastic and viscous components of rubber. The analysis of the rheometry and the kinetic behavior can be used to obtain mathematical models to predict the viscosity of elastomers as a function of the temperature, the time and the degree of curing. These predictions allow the control, the optimization and the design of the process. In this research the phenomenological model of Kamal-Sourour was used to describe the curing kinetics, while the Carreau Macosko model was used to describe the viscous behavior of an ethylene - propylene diene industrial type compound (EPDM). The mathematical parameters for each model where determined by using non-linear regression techniques. Since the viscosity increases significantly while the curing rate decreases, we proposed a mathematical model based on the Carreau expression in order to consider the influence of the kinetic of curing in the apparent viscosity behavior. It was found that after the curing rate reaches its maximum the viscosity tends to infinity; that is, the chemical transition process known as fluidity point or gel point occurs in the vicinity of maximum curing rate. According to the results, it is concluded that rubber viscosity is well described by considering the curing variations; the fluidity point in the vulcanization process can also be obtained by the practical method of phenomenological approach.

APA, Harvard, Vancouver, ISO, and other styles

23

ONISHI, Kenji, and Seishiro FUKUTANI. "Analyses of Curing Process of Rubbers Using Oscillating Rheometer, Part 1." NIPPON GOMU KYOKAISHI 76, no. 1 (2003): 3–8. http://dx.doi.org/10.2324/gomu.76.3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Kelly, A. L., T. Gough, M. Isreb, R. Dhumal, J. W. Jones, S. Nicholson, A. B. Dennis, and A. Paradkar. "In-process rheometry as a PAT tool for hot melt extrusion." Drug Development and Industrial Pharmacy 44, no. 4 (December 4, 2017): 670–76. http://dx.doi.org/10.1080/03639045.2017.1408641.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Arellano, Marcela, Denis Flick, Hayat Benkhelifa, and Graciela Alvarez. "Rheological characterisation of sorbet using pipe rheometry during the freezing process." Journal of Food Engineering 119, no. 3 (December 2013): 385–94. http://dx.doi.org/10.1016/j.jfoodeng.2013.05.017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

de França, Marylinda Santos, Bogdan Cazacliu, Fábio Alonso Cardoso, and Rafael Giuliano Pileggi. "Influence of mixing process on mortars rheological behavior through rotational rheometry." Construction and Building Materials 223 (October 2019): 81–90. http://dx.doi.org/10.1016/j.conbuildmat.2019.06.213.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Götz, Joachim, Hartmut Balzer, and Ruth Hinrichs. "Characterisation of the Structure and Flow Behaviour of Model Chocolate Systems by Means of NMR and Rheology." Applied Rheology 15, no. 2 (April 1, 2005): 98–111. http://dx.doi.org/10.1515/arh-2005-0005.

Full text

Abstract:

Abstract In order to characterise the structure and flow behaviour of model chocolate systems Nuclear Magnetic Resonance (NMR) and rheometry were used to determine the T1 - and T2 - NMR relaxation times and their corresponding flow functions. T1 and T2 characterise the molecular mobility of fluids and correlate with both the zero-shear-rate and infinity viscosity of various chocolate model systems (determined with rotational rheometry and capillary rheometry). Based on this correlation, NMR provides the possibility to determine characteristic viscosities of chocolate masses by means of NMR-relaxation experiments. The viscosities of chocolate masses are important process parameters, as they are used for quality control of the production process. An online process viscosimetry via T2 relaxation would allow the installation of an efficient process control and, thus, a process automation. This NMR application with comparatively short measuring times is especially interesting for disperse systems where the use of conventional rheometric techniques may cause large errors. The only prerequisite for the measurement of the viscosities using NMR is a previous calibration. This was performed with the help of rotational and capillary rheometry. The NMR self-diffusion experiments are especially appropriate to characterise the influence of emulsifiers on the structure and the flow behaviour of chocolate masses.

APA, Harvard, Vancouver, ISO, and other styles

28

Chen, Bing San, Ji Bin Jiang, and Fu Jiang Zhang. "Studying on the Magnetorheological Fluids and its Rheometer." Advanced Materials Research 230-232 (May 2011): 1396–401. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1396.

Full text

Abstract:

This paper presents a magnetorheological(MR) rheometer which consists of a pair of rotating parallel disc, step motor, the signal collecting device, computer software for dynamic analysis etc.. In order to assess the performance of the MR rheometer, high-order spectrum analysis tools are used. The theoretical and experimental results indicate that the rheometer is useful to test the dynamic charicteristics of the MR fluids and the high-order analysis might be helpful to describe MR rheometer dynamic characteristics. The measurement and analysis process based on virtual instruments are automatically controlled by computer in this paper.

APA, Harvard, Vancouver, ISO, and other styles

29

Rosca, I. D., and J. M. Vergnaud. "Study of process of cure of EPDM rubbers in moving die rheometer." Plastics, Rubber and Composites 30, no. 6 (June 2001): 275–81. http://dx.doi.org/10.1179/146580101101541705.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

GLASSCOCK, J. A., and R. S. SMITH. "Rheological Properties of Extreme Pressure Greases Measured Using a Process Control Rheometer." Tribology Transactions 48, no. 4 (October 2005): 464–67. http://dx.doi.org/10.1080/05698190500313411.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Czél, György, and Mate Zattler. "Set Point Based Material Selection Method in Case of Recycled Polypropylene Application." Materials Science Forum 885 (February 2017): 257–62. http://dx.doi.org/10.4028/www.scientific.net/msf.885.257.

Full text

Abstract:

Due to the economic reasons of the injection moulding process, robust technology set point was given in the case of a polypropylene part manufacturing. The part, named lid plate was a relatively humble product not sensitive for small strength parameter changing. K392 coded polypropylene (PP) was given as reference raw material for injection moulding. The technical task was to replace the reference material by using recycled PP. It was necessary to keep the production cycle term. The flow characteristics of the offered recycled polymers were previously unknown. New method and capillary rheometry experimental technique was used to aid the material selection. In the method, the repeatability and the accuracy of rod type capillary rheometry was investigated in order to get more reliable flow behavior data of recycled PP polymer. Relatively low repeatability deviance could be determined in the range of 800-1100 s-1 shear rate range by using rod capillary rheometry. By means of the adequate validated rheometry, the recycled polypropylene could be applied for the given technology set point based forming process.

APA, Harvard, Vancouver, ISO, and other styles

32

Jiang, Xiao Ling, Zong Ming Lei, and Kai Wei. "Application of R/S Rheometer in Low Temperature Drilling Fluid Rheology Determination." Advanced Materials Research 490-495 (March 2012): 3114–18. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.3114.

Full text

Abstract:

With six-speed rotary viscometer measuring the rheology of drilling fluid at low temperature, during the high-speed process, the drilling fluid temperature is not constant at low temperature, which leads to the inaccuracy in rheological measurement. When R/S rheometer is used cooperating with constant low-temperature box , the temperature remains stable during the process of determining the drilling fluid rheology under low temperature. The R/S rheometer and the six-speed rotational viscometer are both coaxial rotational viscometers, but they work in different ways and the two cylindrical clearance between them are different.How to make two viscometer determination result can maintain consistent?The experimental results show that, The use of R/S rheometer, with the shear rate for 900s-1 shear stress values instead of six speed rotary viscometer shear rate for 1022s-1 shear stress values.Then use two-point formula to calculate rheological parameters.The R/S rheometer rheological parameter variation with temperature has a good linear relationship,Can better reflect the rheological properties of drilling fluids with low temperature changerule

APA, Harvard, Vancouver, ISO, and other styles

33

Zheng, Yue Kun, and Yi Jian Huang. "Study and Design of Double Shear Regional Magnetic Rheometer." Applied Mechanics and Materials 275-277 (January 2013): 771–77. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.771.

Full text

Abstract:

A shear magnetic rheometer with a dual MRF shear region has been designed. The effect of magnetic rheometer gap MRF magneto-rheological on the torque measurement has been took full account, so the measurement accuracy improved. The design process using the Equivalent Magnetic Circuit Method to calculate the reluctance of each local area of magnetic rheometer, and use magnetic potential equation calculate the number of coils required for magnetic rheometer. Finally, used ANSYS software simulation analysis of the magnetic field of the magnetic rheometer, proposed fractional differential equations to describe the relationship between the MRF shear stress, shear rate and time, and using nonlinear least-squares method to fit the coefficients of fractional differential equations. The results show that the magnetic field of the two MRF regions is evenly distributed and the difference in the magnetic flux density of the two MRF regions within the ideal range; Coefficients and orders of fractional differential equations affected by the magneto-rheological fluid nature and speed.

APA, Harvard, Vancouver, ISO, and other styles

34

SATO, Takashi. "Kinetic study on the crosslinking process of rubbers with peroxide using oscillating rheometer." NIPPON GOMU KYOKAISHI 70, no. 1 (1997): 43–49. http://dx.doi.org/10.2324/gomu.70.43.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Laza, J. M., J. L. Vilas, F. Mijangos, M. Rodríguez, and L. M. León. "Analysis of the crosslinking process of epoxy–phenolic mixtures by thermal scanning rheometry." Journal of Applied Polymer Science 98, no. 2 (2005): 818–24. http://dx.doi.org/10.1002/app.22106.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Laza, J. M., J. L. Vilas, M. Rodríguez, M. T. Garay, F. Mijangos, and L. M. León. "Analysis of the crosslinking process of a phenolic resin by thermal scanning rheometry." Journal of Applied Polymer Science 83, no. 1 (October 30, 2001): 57–65. http://dx.doi.org/10.1002/app.2231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

KOYAMA, KIYOHITO, KEIJI MINAGAWA, TAMOTSU YOSHIDA, NORIYUKI KURAMOTO, and KATSUFUMI TANAKA. "YIELD PROCESS OF ELECTRORHEOLOGICAL FLUID WITH POLYANILINE PARTICLE." Modern Physics Letters B 08, no. 25 (October 30, 1994): 1563–75. http://dx.doi.org/10.1142/s0217984994001527.

Full text

Abstract:

Electrorheological behaviors of polyaniline/silicone oil suspension were observed by using a modified Couette type rheometer with high resolution for shear stress. The yield behaviors were examined over a wide range of shear strain. The storage modulus and loss tangent were determined under a constant dc electric field. It was clarified that the polyaniline-based ER fluid yields two different strain amplitudes, i.e. about 1% and 50%. The stress-strain curves obtained from shear flow experiments also suggested the existence of two-step yield process. The yield process was found to be dependent on the electric field strength and the particle concentration in different manners. The yield behavior observed is discussed in relation to the structure of particle clusters which causes the ER effect.

APA, Harvard, Vancouver, ISO, and other styles

38

ONISHI, Kenji, and Seishiro FUKUTANI. "Analysis of Curing Process of Rubbers Using Oscillating Rheometer, Part 2. Kinetic Study on Peroxide Curing Process of Rubbers." NIPPON GOMU KYOKAISHI 76, no. 5 (2003): 160–66. http://dx.doi.org/10.2324/gomu.76.160.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Zeb, M., S. Islam, A. M. Siddiqui, and T. Haroon. "Analysis of Third-Grade Fluid in Helical Screw Rheometer." Journal of Applied Mathematics 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/620238.

Full text

Abstract:

The steady flow of an incompressible, third-grade fluid in helical screw rheometer (HSR) is studied by “unwrapping or flattening” the channel, lands, and the outside rotating barrel. The geometry is approximated as a shallow infinite channel, by assuming that the width of the channel is large as compared to the depth. The developed second-order nonlinear coupled differential equations are reduced to single differential equation by using a transformation. Using Adomian decomposition method, analytical expressions are calculated for the the velocity profiles and volume flow rates. The results have been discussed with the help of graphs as well. We observed that the velocity profiles are strongly dependant on non-Newtonian parameter (β~), and with the increase inβ~, the velocity profiles increase progressively, which conclude that extrusion process increases with the increase inβ~. We also observed that the increase in pressure gradients inx- andz-direction increases the net flow inside the helical screw rheometer, which increases the extrusion process. We noticed that the flow increases as the flight angle increase.

APA, Harvard, Vancouver, ISO, and other styles

40

Dordinejad, A. K., F. Sharif, M. Ebrahimi, and R. Rashedi. "Time-sweep rheometry for evaluating polyethylene degradation behavior: Effect of formulation and process conditions." Polymer Testing 70 (September 2018): 39–46. http://dx.doi.org/10.1016/j.polymertesting.2018.06.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Romero, A., V. Perez-Puyana, P. Marchal, L. Choplin, and A. Guerrero. "Emulsification process controlled by a mixer type rheometer in O/W protein-based emulsions." LWT - Food Science and Technology 76 (March 2017): 26–32. http://dx.doi.org/10.1016/j.lwt.2016.10.046.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Wang, Yong, Ai-xiang Wu, Zhu-en Ruan, Zhi-hui Wang, Zong-su Wei, Gang-feng Yang, and Yi-ming Wang. "Reconstructed rheometer for direct monitoring of dewatering performance and torque in tailings thickening process." International Journal of Minerals, Metallurgy and Materials 27, no. 11 (November 2020): 1430–37. http://dx.doi.org/10.1007/s12613-020-2116-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Salas-Bringas, C., W. K. Jeksrud, and R. B. Schüller. "A new on-line process rheometer for highly viscous food and animal feed materials." Journal of Food Engineering 79, no. 2 (March 2007): 383–91. http://dx.doi.org/10.1016/j.jfoodeng.2006.02.002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Mohamad Nor, N. H., Muhammad Hussain Ismail, Nur Atikah Abu Kasim, N. Muhamad, and M. A. Taib. "Characterization and Rheological Studies on Ready-Made Feedstock of Stainless Steel 316L in Metal Injection Molding (MIM) Process." Applied Mechanics and Materials 465-466 (December 2013): 709–14. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.709.

Full text

Abstract:

Current trend for manufacturers associated to MIM industry try to enhance the feedstock in term of its characteristics, since it is the most crucial part of the MIM process. This paper covered the characterization and rheological studies on a ready-made feedstock of stainless steel 316L which is vital to determine the availability and suit the needs of many advanced applications. There are three different experiments involved which are Scanning Electron Microscope (SEM), Differential Scanning Calorimeter (DSC), Thermogravimetric (TGA) and Capillary Rheometer. Observation through SEM gives an insight of the bonding microstructure matrices of the feedstock and also determines the homogeneity of the feedstock. DSC testing defines the melting temperature of the 3 binders used which are 62.07°C for surfactant, 178.72°C for filler and 236.61°C for backbone binder. From TGA result, it showed that the total weight loss of feedstock was 39%. Throughout the capillary rheometer testing, the feedstocks viscosity was decreasing as the shear rate increasing. The feedstock exhibits pseudoplastic behaviour since its flow behaviour index was less than 1. It is founded that at the temperature of 190°C, the feedstock exhibits the best characteristics for injection.

APA, Harvard, Vancouver, ISO, and other styles

45

Iwański, Marek, Anna Chomicz-Kowalska, Grzegorz Mazurek, Przemysław Buczyński, Małgorzata Cholewińska, Mateusz M. Iwański, Krzysztof Maciejewski, and Piotr Ramiączek. "Effects of the Water-Based Foaming Process on the Basic and Rheological Properties of Bitumen 70/100." Materials 14, no. 11 (May 25, 2021): 2803. http://dx.doi.org/10.3390/ma14112803.

Full text

Abstract:

The process of water-based foaming of bitumen produces binders that can be incorporated in cold recycled asphalt mixes and pavement upper structural layers made of half-warm mix asphalt prepared at 100–130 °C. During the foaming process, cold water and air act on hot bitumen (160–170 °C), which results in the explosive vaporization of water leading to changes in the binder structure. The impact of foaming on the properties of bitumen 70/100 was evaluated by investigating the binder characteristics before and after foaming. Determination of two foaming parameters, maximum expansion and half-life, was followed by measurements of penetration at 25 °C, softening point, Fraass breaking point, and dynamic viscosity at 60, 90, and 135 °C. Rheological and low-temperature tests were also performed before and after foaming bitumen 70/100. The Bending Beam Rheometer method was applied to determine the low temperature stiffness modulus. A DHR-2 rheometer was used to determine the dynamic modulus and phase angle of the tested binder. The Black and master curves before and after foaming were plotted in the 2S2P1D model and the model parameters were analysed. Analysis of the test results confirmed the effects of the foaming process on the basic, low-temperature, and rheological characteristics of the bitumen.

APA, Harvard, Vancouver, ISO, and other styles

46

He, Hong, and Jian Guo Zhou. "On-Line Measurement of Rheological Properties of LDPE, HDPE and LDPE/MICA Systems in Single-Screw Extrusion." Advanced Materials Research 941-944 (June 2014): 1788–91. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1788.

Full text

Abstract:

The quality of extrudate is closely related to its rheological properties during extrusion. Therefore, on-line measurement of rheological properties of polymer is important in extrusion process. In the present work, comparisons between the on-line viscosities of LDPE in single screw extruder and that in lab under the same condition were made by using online rheometer. Effects of set temperature of on-line rheometer, screw configuration and different positions, as well as weight proportions of filler, size of MICA particles of LDPE/MICA multiphase system on the melt viscosity in single screw extrusion are discussed.

APA, Harvard, Vancouver, ISO, and other styles

47

Leblanc, Jean L., and Christophe de la Chapelle. "Characterizing Gum Elastomers by Fourier Transform Rheometry." Rubber Chemistry and Technology 76, no. 4 (September 1, 2003): 979–1000. http://dx.doi.org/10.5254/1.3547786.

Full text

Abstract:

Abstract Fourier transform (FT) rheometry is an emerging new technique that allows the linear and non-linear viscoelastic behavior of polymer materials to be accurately investigated. Basically samples are submitted to torsional harmonic strain at fixed frequency and temperature in order to capture strain and torque signals. A commercial instrument, i.e. the Rubber Process Analyzer RPA 2000® (Alpha Technologies), was suitably modified, essentially in using a fast electronic analogic-digital conversion card to record and treat torque and strain signals using purposely written software. Details of such modifications were previously published and the work presented is a sequel of this development. The quality of the applied strain is first precisely documented through FT and found excellent, particularly in the high strain range. Three gum EPDM with different macromolecular characteristics (MWD and long chain branching) were analyzed either using standard dynamic testing, i.e. essentially in the linear viscoelastic range, or using the Fourier transform rheometry approach, by considering data gathered in the far non-linear viscoelastic range. Data obtained are considered with respect to know features of the samples. A series of SBR 1500 samples, collected from various manufacturers, were first analyzed using standard methods; as expected very small differences were seen. Then FT was used to consider torque signals at very high strain (up to 400% at 1 Hz). Using a simple 4-parameter model to treat the variation upon increasing strain of the relative third harmonic component of the torque signal, differences are clearly detected that are discussed with respect to available polymer manufacturing information.

APA, Harvard, Vancouver, ISO, and other styles

48

Humphries, C. A. M., and J. Parnaby. "Polymer Melt Rheological Property Measurement in a Novel Composite-Geometry Flow Rheometer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 200, no. 5 (September 1986): 325–34. http://dx.doi.org/10.1243/pime_proc_1986_200_136_02.

Full text

Abstract:

A novel rheometer is described, in which extensional viscosity and elastic shear compliance are determined simultaneously from pressure measurements taken on steady state polymer melt flows through an open-ended die with successive, similarly shaped, converging and diverging zones. Equations incorporating practically realistic simplifying approximations are developed for the calculation of extensional viscosity and shear compliance from the measured pressure data. The construction of a prototype rheometer is described, and results from its operation are presented. Agreement between these results and published melt elasticity data for a low-density polyethylene material gives evidence to confirm the basic rheometric principle and flow analysis. The implications of pressure measurement errors are discussed. Assembly of the new composite-geometry rheometer in series with a conventional capillary viscometer would give in-line shear viscosity characterization simultaneously and facilitate on-line processing of pressure data from the converging and diverging flows by microcomputer to provide complete characterizations for practical use in polymer process machinery design. The work represents a significant advance on the basic empirical power law modelling process used for many years by practising engineers to represent shear viscosity phenomena as a basis for design. No other methodology is currently available to suit the engineer.

APA, Harvard, Vancouver, ISO, and other styles

49

Woo Inn, Yong, Ashish M. Sukhadia, and William M. Whitte. "A study of “worms” melt fracture in polyethylene extrusion blow molding process using capillary rheometry." Polymer Engineering & Science 56, no. 6 (March 2, 2016): 650–56. http://dx.doi.org/10.1002/pen.24291.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Mąka, Honorata, Tadeusz Spychaj, and Jakub Adamus. "Lewis acid type deep eutectic solvents as catalysts for epoxy resin crosslinking." RSC Advances 5, no. 101 (2015): 82813–21. http://dx.doi.org/10.1039/c5ra12664a.

Full text

Abstract:

The curing process of epoxy resin with deep eutectic solvents (DES), composed of choline chloride and ZnCl₂or SnCl₂, as cationic catalysts has been investigated using rheometry, DSC and FTIR techniques.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!