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Статті в журналах з теми "Discrete coatings"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 липня 2025

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1

Antonyuk, V., and L. Lopata. "Optimization of discrete structure of electrospark coatings." Problems of Tribology 30, no. 2/116 (2025): 77–83. https://doi.org/10.31891/2079-1372-2025-116-2-77-83.

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Анотація:
The presented article considers the disadvantages of chromium coatings and shows the possibility of their elimination by obtaining coatings of discrete structure. The principle of coatings of discrete structure allows to organically combine physical processes underlying pulse hardening methods with a discrete structure determining their service properties. It is shown and substantiated that the method of electric spark alloying is the most suitable for applying discrete coatings, since this process is discrete by its nature. The advantage of discrete coatings is the absence of a softening effe
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2

Tokaruk, V., O. Mikosianchyk, R. Mnatsakanov, and N. Rohozhyna. "Microgeometrical characteristics of electrospark coatings in the initial state." Problems of tribology 98, no. 4 (2020): 33–39. http://dx.doi.org/10.31891/2079-1372-2020-98-4-33-39.

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Анотація:
Microgeometric parameters of the effect of discrete electrospark coatings on their stress-strain state have been evaluated for the case of using a combined technology of modification of duralumin D16, which includes the technique of electrospark alloying with subsequent surface plastic deformation of coatings formed. According to the profilograms of discrete electrical coatings, the curves of the bearing surface (Abbott curves) were constructed and the parameters that drastically affect tribological characteristics of the coatings were determined. It was shown that modification of duralumin D1
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3

Liu, Xuejuan, Zhiguo Zhou, Ming Chen, Zheng Liu, Shuhui Jiang, and Lei Wang. "Preparation of Durable Superhydrophobic Coatings Based on Discrete Adhesives." Coatings 14, no. 4 (2024): 463. http://dx.doi.org/10.3390/coatings14040463.

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Анотація:
Due to the low adhesion observed at the interface between solid and liquid, superhydrophobic coatings hold significant promise for various applications, such as self-cleaning, anti-corrosion, anti-icing, and drag reduction. However, a notable challenge hindering their widespread adoption in these domains lies in their delicate durability. In this study, we propose a straightforward method for preparation. The fluorosilicone resin is initially discretized through a gradual introduction of nonsolvent into its solution, followed by thorough mixing and stirring with silica nanoparticles. The resul
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4

Loganina, Valentina I., and Bassam Shareef Deneef Al Saedi. "Fastness of Protective and Decorative Coatings Construction Products and Structures to the Action of Wind." Defect and Diffusion Forum 410 (August 17, 2021): 773–77. http://dx.doi.org/10.4028/www.scientific.net/ddf.410.773.

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Анотація:
The article provides information about the stress state protective and decorative coatings during aging. The influence of the discrete nature of the substrate on the change in the stress state of the coatings from the action of the wind load is considered. It was revealed that for each type of coating there is its own critical value of the pore size (unfilled paint), the excess of which leads to cracking of the coatings. A method is proposed for selecting the optimal coating thickness.
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5

Lu, Yun, Liang Hao, Hiromasa Sato, Su Jun Guan, Hiroyuki Yoshida, and Hiroshi Asanuma. "Formation Process of Ti Coatings in Mechanical Coating with Different Rotation Speed." Materials Science Forum 833 (November 2015): 161–64. http://dx.doi.org/10.4028/www.scientific.net/msf.833.161.

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Анотація:
Ti coatings on alumina (Al2O3) balls had been prepared by mechanical coating technique (MCT), and the influence of the rotation speed on the coating formation process were investigated. The crystal structure and microstructure of the Ti coatings were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The formation process of Ti coatings was examined and discussed. The results showed that the rotation speed had great influence on the coating formation process. With increasing the rotation speed, the speed of coating formation had been accelerated and the surface bec
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6

Solovykh, E. K., I. V. Shepelenko, M. I. Chernovol, S. O. Mahopets, A. E. Solovuch, and S. E. Katerynych. "Optimization of the technology for applying discrete coatings in restoration of bronze parts by electrospark alloying." Problems of Tribology 28, no. 1/107 (2023): 51–58. http://dx.doi.org/10.31891/2079-1372-2023-107-1-51-58.

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Анотація:
In this work, a multicriteria optimization of the technology for applying discrete coatings by electrospark alloying in the restoration of bronze parts is carried out. As criteria for optimizing the process of electrospark alloying, tribotechnical characteristics were chosen – the wear intensity and friction coefficient of the coating. As adjustable parameters, those design, technological and operational factors that have the greatest influence on the value of optimization criteria are used: coating material; lubricant; operating current; amplitude of electrode oscillations; sliding speed; spe
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7

Feng, Ai Xin, Yu Peng Cao, Chuan Chao Xu, et al. "Experimental Study on Testing Ni-Containing Stainless Steel Protective Coatings by Pulsed Laser Scratching." Applied Mechanics and Materials 43 (December 2010): 651–56. http://dx.doi.org/10.4028/www.scientific.net/amm.43.651.

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Анотація:
In the experiment, we use pulsed laser to conduct discrete scratching on Ni-containing stainless steel protective coatings to test residual stress situation after the matrix is scratched; then to analyze the the impact of the impact stress wave on coating - substrate bonding strength according to the test results, finally to infer the laser power density range within which it occurs coating failure. The study shows that: after laser discrete scratching, the residual stress of the center of the laser-loaded point on matrix surface gradually reduces when the pulsed laser power density increases.
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8

Mansouri, Jaleh, Vi Khanh Truong, Shane MacLaughlin, et al. "Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties." Nanomaterials 9, no. 11 (2019): 1610. http://dx.doi.org/10.3390/nano9111610.

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In this work, we report on the incorporation of a siloxane copolymer additive, poly((2-phenylethyl) methylsiloxane)-co(1-phenylethyl) methylsiloxane)-co-dimethylsiloxane), which is fully soluble at room temperature, in a rapid-cure thermoset polyester coating formulation. The additive undergoes polymerization-induced phase segregation (PIPS) to self-assemble on the coating surface as discrete discoid nanofeatures during the resin cure process. Moreover, the copolymer facilitates surface co-segregation of titanium dioxide pigment microparticulate present in the coating. Depending on the composi
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9

Liu, Hong Wei, Sheng Zhu, and Feng Liang Yin. "SHS Reactive Arc Spray - A New Method to Prepare Multiphase Ceramic Coatings." Materials Science Forum 789 (April 2014): 518–21. http://dx.doi.org/10.4028/www.scientific.net/msf.789.518.

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Анотація:
Ti (C,N)-TiB2-Al2O3 multiphase ceramic coatings were in-situ synthesized on a steel substrate by SHS reactive arc spray technique. The composition and microstructure of the coatings were characterized by X ray diffraction, scanning electron microscopy and energy dispersive spectrometry. The results showed that multiphase ceramic coatings, composed of TiB2, TiB, TiC0.3N0.7, TiN, Al2O3 and AlN, can be prepared with the reactive cored wires by SHS reactive arc spray. The coatings exhibit the typical layer microstructure, with discrete second phases distributed in the continuous base phase. The bo
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10

Korbut, Ievgen, Valeriia Parnenko, Tetiana Nikolaienko, and Oleksandr Danylenko. "The location of discrete areas of coat with globular structure on the tool surfaces with different cutting schemes." Technical sciences and technologies, no. 4 (38) (December 30, 2024): 44–56. https://doi.org/10.25140/2411-5363-2024-4(38)-44-56.

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Анотація:
The development of the aerospace and automotive industries is linked to the use of fibre polymer composites. In order to increase the wear resistance of tools for machining these materials, discrete coatings of a globular structure are used on the working surfaces of the tools. The loading of the cutting edges of such tools with a discrete coating of globular structure depends not only on their materials and coating, but also on the cutting pattern, which corresponds to microcutting by coating elements. According to this scheme, the position of globules along the edges and discrete areas perpe
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11

Moore, Bailey, Ebrahim Asadi, and Gladius Lewis. "Deposition Methods for Microstructured and Nanostructured Coatings on Metallic Bone Implants: A Review." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5812907.

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Анотація:
A review of current deposition processes is presented as they relate to osseointegration of metallic bone implants. The objective is to present a comprehensive review of different deposition processes used to apply microstructured and nanostructured osteoconductive coatings on metallic bone implants. Implant surface topography required for optimal osseointegration is presented. Five of the most widely used osteoconductive coating deposition processes are reviewed in terms of their microstructure and nanostructure, usable thickness, and cost, all of which are summarized in tables and charts. Pl
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12

Volodymyr, Tulupov, and Onyshchuk Serhii. "USE OF COMBINED PROCESSING METHODS TO ENSURE THE LIFE CYCLE OF PRODUCTS." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 1(9) (December 27, 2024): 29–33. https://doi.org/10.20998/2079-004x.2024.1(9).04.

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Анотація:
The use of combined processing methods to ensure the lifecycle of engineering products has been investigated. The feasibility of using pulse electric current as a heat source for implementing the aluminothermic strengthening process has been substantiated. The use of pulse electric current enables the attainment of discrete coatings, thereby enhancing the product lifecycle. The initiation conditions of the aluminothermy process have been identified; the feasibility of using chromium oxide for aluminum oxide synthesis has been experimentally confirmed. Metallographic studies have confirmed the
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13

Choudhary, R. K., V. Kain, and R. C. Hubli. "Formation of alumina-aluminide coatings on ferritic-martensitic T91 steel." Journal of Mining and Metallurgy, Section B: Metallurgy 50, no. 2 (2014): 165–70. http://dx.doi.org/10.2298/jmmb140724022c.

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Анотація:
In this work, alumina-aluminide coatings were formed on ferritic-martensitic T91 steel substrate. First, coatings of aluminum were deposited electrochemically on T91 steel in a room temperature AlCl3-1-ethyl-3-methyl imidazolium chloride ionic liquid, then the obtained coating was subjected to a two stage heat treatment procedure consisting of prolonged heat treatment of the sample in vacuum at 300 ?C followed by oxidative heat treatment in air at 650 ?C for 16 hours. X-ray diffraction measurement of the oxidatively heat treated samples indicated formation of Fe-Al and Cr-Al intermetallics and
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14

Vorontsov, O. V., L. O. Tulupova, and I. V. Vorontsova. "COATINGS DISCRETE SURFACES CONSTRUCTION BY SUPERPOSITIONS OF ADJUSTED MESH FRAMES." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 50 (2018): 36–45. http://dx.doi.org/10.26906/znp.2018.50.1056.

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Анотація:
The method of curve surface discrete geometric modeling on the basis of two discrete frames superimpositions, formed by a static-geometric method, and on the basis of a single surface curve nodal points superimposition, also formed by static-geometric method, is considered. It has been determined that the suggested method allows to model balanced discrete structures formed on the specified contour nodes, as well as those passing through the specified nodal points without composing and solving equations systems.
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15

Vikulova, Evgeniia S., Ksenya I. Karakovskaya, Tatyana P. Koretskaya, et al. "MOCVD of Noble Metal Film Materials for Medical Implants: Microstructure and Biocompatibility of Ir and Au/Ir Coatings on TiNi." Coatings 11, no. 6 (2021): 638. http://dx.doi.org/10.3390/coatings11060638.

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Noble metals such as Ir, Pt, Au are promising as coatings for metal medical implants to improve biocompatibility and corrosion resistance. Moreover, these coatings can be used as a basis for the further formation of bimetallic hetero-structures with enhanced antibacterial properties. In this work, we develop an approach to obtain such coatings by metal-organic chemical vapor deposition (MOCVD). We have been focused on the formation of Ir coating with developed morphology and subsequent discrete Au coating onto the titanium nickelide (TiNi) implant material. Iridium was deposited in an oxidizin
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16

Bor, Amgalan, Battsetseg Jargalsaikhan, Jehyun Lee, and Heekyu Choi. "Effect of Different Milling Media for Surface Coating on the Copper Powder Using Two Kinds of Ball Mills with Discrete Element Method Simulation." Coatings 10, no. 9 (2020): 898. http://dx.doi.org/10.3390/coatings10090898.

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Анотація:
This study investigated the effect of three different ball materials on the metal-based carbon nanotube (CNT) composites used as surface coatings on metal-powder to fabricate high-quality nanocomposites. The effect of ball material, different rotation speeds, and milling times on the coating characteristics of the metal-based nanocomposite were studied. The mechanical dry coating was used to fabricate CNT coatings on the surface of copper powder particles via two different ball milling machines such as a traditional ball mill and a stirred ball mill. We explored the effect of the milling media
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17

Movchan, B. A. "Discrete nanosized metallic coatings produced by EB-PVD." Surface Engineering 32, no. 4 (2016): 258–66. http://dx.doi.org/10.1179/1743294415y.0000000092.

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18

Zhou, Ye, Caichao Zhu, Huaiju Liu, Chaosheng Song, and Zufeng Li. "A numerical study on the contact fatigue life of a coated gear pair under EHL." Industrial Lubrication and Tribology 70, no. 1 (2018): 23–32. http://dx.doi.org/10.1108/ilt-10-2016-0256.

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Анотація:
Purpose Coatings are widely used in gears to keep interface from wearing excessively. The purpose of this paper is to study the effect of coating properties and working conditions on the pressure, the shear traction, stresses as well as the fatigue life of spur gear. Design/methodology/approach A numerical contact fatigue life model of a coated spur gear pair under elastohydrodynamic lubrication (EHL) is developed based on the characteristics of gear geometry and kinematics, lubrication conditions and material properties. Frequency response functions and the discrete convolute and fast Fourier
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19

Dement'ev, Anatoliy, Evgeniy Podoplelov, and Georgi Petrushin. "PRINCIPLES OF CREATION OF DISCRETE TREAD COATINGS FOR HEAT EXCHANGE SURFACES." Scientific Papers Collection of the Angarsk State Technical University 2024, no. 1 (2024): 107–10. http://dx.doi.org/10.36629/2686-7788-2024-1-107-110.

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Анотація:
The paper proposes the principles of creating discrete tread coatings for heat exchange surfaces. Protective metallized coatings allow you to protect heat exchange equipment from corrosion and in-crease its service life
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20

Liu, Yuchuan, W. Wayne Chen, Dong Zhu, Shuangbiao Liu, and Q. Jane Wang. "An Elastohydrodynamic Lubrication Model for Coated Surfaces in Point Contacts." Journal of Tribology 129, no. 3 (2007): 509–16. http://dx.doi.org/10.1115/1.2736433.

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Анотація:
An elastohydrodynamic lubrication (EHL) model for coated surfaces in point contacts has been developed by combining the elastic deformation formulation for the coated surfaces with an EHL model. Inverse fast Fourier transform (IFFT) is employed first to obtain the influence coefficients (ICs) from the frequency response function (FRF). The subsequent calculation of elastic deformation is performed using the efficient algorithm of discrete convolution and fast Fourier transform (DC-FFT). The coating EHL model is verified by the comparison to available numerical results. The effects of coating o
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21

Ainakulova, D., S. Muradova, M. Al Azzam Khaldun, et al. "Analytical Review of Conductive Coatings, Cathodic Protection, and Concrete." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 329, no. 2 (2023): 92–102. http://dx.doi.org/10.31643/2024/6445.20.

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Анотація:
The principal and most expensive type of degradation that currently affects the performance of reinforced concrete bridge constructions is the corrosion of steel reinforcement. Strong financial losses result from the corrosion of reinforced concrete structures. One popular technique for preventing corrosion in reinforced concrete structures is cathodic protection. Since it can give necessary current in a situation where reinforced concrete buildings have high resistance, impressed present cathodic protection (ICCP) provides strength and adaptability. Conductive coatings, discrete anode systems
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22

Bobzin, Kirsten, Tobias Brögelmann, Christian Kalscheuer, et al. "DLC coated spur gears – Part II: coating properties and potential for industrial use." Industrial Lubrication and Tribology 73, no. 4 (2021): 621–34. http://dx.doi.org/10.1108/ilt-07-2020-0256.

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Анотація:
Purpose This paper aims to address the coating and compound analysis of diamond-like carbon (DLC) on steel, to understand the frictional behavior in tribological gear systems presented in paper Part I. Here, the Ti and Zr modified DLC coating architectures are analyzed regarding their chemical, mechanical and thermophysical properties. The results represent a systematic analysis of the thermal insulating effect in tribological contact of DLC coated gears. Design/methodology/approach The approach was to evaluate the effect of the substitution of Zr through Ti at the reference coating ZrCg to Ti
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23

Dabert, Marine, Dorina T. Papanastasiou, Loïc Vidal, et al. "Enhancing the Properties of Photo-Generated Metallized Nanocomposite Coatings through Thermal Annealing." Nanomaterials 14, no. 2 (2024): 193. http://dx.doi.org/10.3390/nano14020193.

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In this work, the effect of thermal annealing on silver nanoparticles@polymer (AgNPs@polymer) nanocomposite coatings was investigated. These photo-generated metallized coatings have a spatial distribution of metal nanoparticles, with a depth-wise decrease in their concentration. During annealing, both structural and morphological variations, as well as a spatial reorganization of AgNPs, were observed, both at the surface and in the core of the AgNPs@polymer coating. Owing to their increased mobility, the polymer chains reorganize spontaneously, and, at the same time, a hopping diffusion proces
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24

Li, Dingjun, Peng Jiang, Fan Sun, Xiaohu Yuan, Jianpu Zhang, and Xiaoying Cao. "Water-droplet erosion behavior of high-velocity oxygen-fuel-sprayed coatings for steam turbine blades." Corrosion Reviews 40, no. 1 (2021): 39–49. http://dx.doi.org/10.1515/corrrev-2021-0049.

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Abstract The water-droplet erosion of low-pressure steam turbine blades under wet steam environments can alter the vibration characteristics of the blade, and lead to its premature failure. Using high-velocity oxygen-fuel (HVOF) sprayed water-droplet erosion resistant coating is beneficial in preventing the erosion failure, while the erosion behavior of such coatings is still not revealed so far. Here, we examined the water-droplet erosion resistance of Cr3C2–25NiCr and WC–10Co–4Cr HVOF sprayed coatings using a pulsed water jet device with different impingement angles. Combined with microscopi
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25

Ghasemi, MA, and SR Falahatgar. "Investigation on the effective parameters of through-the-width crack propagation in ceramic coatings due to substrate tension using discrete element method." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 1 (2019): 144–55. http://dx.doi.org/10.1177/1464420719876314.

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Анотація:
This paper aims to simulate surface cracking and interfacial delamination in ceramic coatings due to their application in different industries. For this purpose, one of the most widely used ceramics, yttrium-stabilized zirconia, which is used as a thermal insulator for superalloy substrate is considered as a case study. Discrete element method was used, due to its great ability to capture the damages at the microscale, to investigate the effect of crack spacing and coating thickness on crack initiation and propagation. Discrete element method solver code is provided by the authors. To investig
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26

Gu, Guochao, Yibo Li, Kangqing Zuo, and Guiyong Xiao. "The Influence of pH Value on the Microstructure and Properties of Strontium Phosphate Chemical Conversion Coatings on Titanium." Molecules 28, no. 18 (2023): 6651. http://dx.doi.org/10.3390/molecules28186651.

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Анотація:
Strontium (Sr) is a trace element in the human body that can promote bone formation and inhibit bone absorption. A conversion coating of strontium phosphate (Sr-P) on the surface of titanium (Ti) can improve its biological properties and has many potential applications in the fields of dentistry and orthopedics. In the present study, Sr-P coatings with SrHPO4 and Sr3(PO4)2 crystals on Ti are prepared by a phosphate chemical conversion (PCC) treatment and the effect of pH values on the properties of the Sr-P coatings is researched. The results prove that the phase composition, morphology, and c
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27

Duan, Yuping, Wei Liu, Lulu Song, and Tongmin Wang. "A discrete structure: FeSiAl/carbon black composite absorption coatings." Materials Research Bulletin 88 (April 2017): 41–48. http://dx.doi.org/10.1016/j.materresbull.2016.12.015.

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28

Liu, Xuejuan, Zhenxia Shi, Lin Lin, et al. "Preparation of Wear-Resistant Superhydrophobic Coatings Based on a Discrete-Phase Adhesive." Coatings 13, no. 4 (2023): 682. http://dx.doi.org/10.3390/coatings13040682.

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Анотація:
Among the many methods to prepare superhydrophobic coatings, the liquid spraying method has the advantages of simple operation, low equipment and substrate requirements, and a low cost to achieve large-scale industrialization. However, superhydrophobic coatings prepared using the existing one-step and two-step spraying methods are not wear resistant, and the failure mechanism is also not clear. After preparing coatings using existing methods and conducting wear tests, we show that the reason for their lack of wear resistance is the excessive bonding caused by the nanoparticles embedded in the
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29

Wei, Wenlu, Baojun Yan, Yuekun Heng, et al. "Secondary electron emission characteristics of alumina coating on metallic substrate prepared by atomic layer deposition." Journal of Instrumentation 18, no. 02 (2023): P02002. http://dx.doi.org/10.1088/1748-0221/18/02/p02002.

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Анотація:
Abstract The main objective of this study is to research the secondary electron emission characteristic of different thickness alumina coatings which are prepared by atomic layer deposition (ALD) technique on several metallic secondary-emitting materials. The experimental results reveal that secondary electron yield (SEY) property concerned with the metal work function and the surface topography of alumina coatings when coating thickness is in the nanometer level. In addition, after utilizing SEY measurement setup and pulsed electron gun, the SEY curves of metallic substrates with different th
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30

Powell, Tommy, Ryan O’Donnell, Mark Hoffman, et al. "Experimental investigation of the relationship between thermal barrier coating structured porosity and homogeneous charge compression ignition engine combustion." International Journal of Engine Research 22, no. 1 (2019): 88–108. http://dx.doi.org/10.1177/1468087419843752.

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Анотація:
Heat transfer has a profound influence on homogeneous charge compression ignition combustion. When a thermal barrier coating is applied to the combustion chamber, the insulating effect magnifies the wall temperature swing, decreasing heat transfer during combustion. This enables improvements in both thermal and combustion efficiency without the detrimental impacts of intake charge heating. Increasing the temperature swing requires coatings with lower thermal conductivity and heat capacity. A promising avenue for simultaneously decreasing both thermal conductivity and capacity is to increase th
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31

Chen, Zhenzhen, Chenchen Xu, Feilong Zhang, and Tao Sun. "Numerical and Experimental Study of Enhanced Heat Dissipation Performance of Graphene-Coated Heating Cables." Coatings 15, no. 7 (2025): 777. https://doi.org/10.3390/coatings15070777.

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Анотація:
Low-temperature radiant heating systems utilizing heating cables face challenges including low heat dissipation efficiency and high energy consumption, hindering widespread application. Graphene coatings, characterized by high thermal conductivity and far-infrared radiation properties, offer a novel approach to enhance cable heat dissipation efficiency. This study systematically investigates the effects of coating position, thickness, and ambient temperature on cable heat dissipation using numerical simulations and experiments. A three-dimensional heat transfer model of the heating cable was e
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32

Barth, K. L., and W. S. Sampath. "Environmentally benign vacuum deposition with air-to-vacuum-to-air technology." Journal of Materials Research 10, no. 3 (1995): 493–96. http://dx.doi.org/10.1557/jmr.1995.0493.

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Анотація:
The deposition of thin films and coatings frequently results in the generation of toxic waste, volatile organic compounds, or large amounts of waste water and sludge. Vapor deposition in vacuum offers a more environmentally benign alternative, but is not prevalent outside of the microelectronics industry due to economic reasons. However, vacuum coating could be more widely accepted, and could potentially replace nonvacuum deposition methods, if either the cycle time or costs associated with vacuum coating were reduced. In order to reduce the cycle time for vacuum deposition, a robust system fo
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33

Schubert, Martin F., David J. Poxson, Frank W. Mont, Jong Kyu Kim, and E. Fred Schubert. "Performance of Antireflection Coatings Consisting of Multiple Discrete Layers and Comparison with Continuously Graded Antireflection Coatings." Applied Physics Express 3, no. 8 (2010): 082502. http://dx.doi.org/10.1143/apex.3.082502.

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34

Tang, Yanxia, Yong Huang, and Keyong Zhu. "Optical Properties of Black Carbon Aerosols with Different Coating Models." Photonics 9, no. 5 (2022): 359. http://dx.doi.org/10.3390/photonics9050359.

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Анотація:
Research on the optical properties of black carbon (BC) aerosols is highly important for investigating global climate change. A general inhomogeneous particle superposition model is developed. Inhomogeneous particles with arbitrary shapes can be constructed by this model. BC aerosols with core-shell, spherical, ellipsoid, and irregular coating models are established to explore the impact of coating shape on their optical properties. The optical properties are studied employing the discrete dipole approximation method (DDA). The influences of the morphology of BC aerosols, the coating volume fr
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35

Varney, Dan, Martti Toivakka, and Doug Bousfield. "Discrete element method to predict the mechanical properties of pigmented coatings." Journal of Coatings Technology and Research 16, no. 6 (2019): 1683–89. http://dx.doi.org/10.1007/s11998-019-00255-w.

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36

Kainz, Christina, Ilse Letofsky-Papst, Christian Saringer, et al. "Oxidation behavior of a cathodic arc evaporated Cr0.69Ta0.20B0.11N coating." Journal of Vacuum Science & Technology A 41, no. 2 (2023): 023102. http://dx.doi.org/10.1116/6.0002356.

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Анотація:
CrTaBN hard coatings deposited by cathodic arc evaporation are a promising new material class for use in demanding applications, due to their high hardness and good thermal stability in protective atmosphere. Up to now however, studies on the detailed oxidation mechanism of quaternary CrTaBN coatings are lacking in the literature. Thus, within this work, the oxidation behavior of a Cr0.69Ta0.20B0.11N coating grown by cathodic arc evaporation was studied in a combinatorial approach of advanced characterization techniques. In situ high-energy x-ray diffraction at a synchrotron radiation facility
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37

Furkó, Monika, Éva Fazakas, Enikő Réka Fábián, and Csaba Balázsi. "Electrochemical and Morphological Characterization of Silver Doped Bioceramic Layer on Metallic Implant Materials for Orthopaedic Application." Materials Science Forum 885 (February 2017): 7–12. http://dx.doi.org/10.4028/www.scientific.net/msf.885.7.

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Анотація:
This study presents the production of silver doped bioactive calcium-phosphate (CaP) coatings on commonly used orthopaedic implant materials (Ti6Al4V). The deposition process was performed by pulse current technique from electrolyte containing the appropriate amount of Ca(NO3)2 and NH4H2PO4 components at 70 °C. In order to modify the CaP layer, Ag+ ions were added to the base electrolyte. The electrochemical behaviour of the coatings was investigated by potentiodynamic polarization method in conventional Ringer’s solution in a three-electrode open cell. The corrosion properties of samples prep
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38

Akhmetov, A., Zh V. Eremeeva, A. E. Kudryashov, et al. "Fabrication of high speed steel electrodes with MoSi2–MoB–HfB2 ceramic additives for electrospark deposition on die steel." Izvestiya. Non-Ferrous Metallurgy, no. 2 (June 30, 2024): 55–69. http://dx.doi.org/10.17073/0021-3438-2024-2-55-69.

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Анотація:
The electrodes for electrospark deposition (ESD) were fabricated from hot-pressed blanks composed of a mechanically alloyed powder mixture of R6M5K5 high speed steel. This mixture was enriched with a 40 % addition of heat-resistant MoSi2–MoB–HfB2 ceramics, produces through the self-propagating high-temperature synthesis method (resulting in the R6M5K5-K electrode), as well as variant without any ceramic addition (resulting in the R6M5K5 electrode). We examined both the composition and structure of the electrode materials and the coatings derived from them, identifying the characteristics of ma
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39

Korbut, Ievgen, Valeriya Parnenko, Tatyana Nikolayenko, and Oleksandr Plivakк. "INVESTIGATION OF ACCURACY OF HOLES IN FIBER POLYMERIC COMPOSITE MATERIALS DURING TREATMENT WITH DRILLS, WITH THE SURFACE SURFACED ON THEIR." Technical Sciences and Technologies, no. 1(27) (2022): 101–7. http://dx.doi.org/10.25140/2411-5363-2022-1(27)-101-107.

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Анотація:
The article considers the main brands of tool materials used for cutting tools used for processing fibrous polymer com-posite materials (FIC) and sets requirements for them. The analysis of advantages and disadvantages of their application is carried out. It is noted that to increase the wear re-sistance of cutting tools made of high-speed steels and carbide alloys for processing fibrous polymeric composite materials are currently used continuous coatings based on TiC, TiN, TiCN, TiALON, AlCrN and others, however, the use of such coatings does not significantly increase resistance due to the i
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40

Kaz'min, Aleksandr I. "Multifrequency optimization method of measurement the frequency dependency of electrophysical parameters of dielectric and magnetodielectric coatings." Izmeritel`naya Tekhnika, no. 9 (2021): 54–61. http://dx.doi.org/10.32446/0368-1025it.2020-9-54-61.

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Анотація:
The issues of experimental determination of electrodynamic parameters of existing and new synthesized materials and coatings used in the microwave range are highlighted. Problems arising from measurements of the electrophysical and geometric parameters of dielectric and magnetodielectric coatings, taking into account their placement on a metal substrate, by radio wave methods are considered. We present the new radio wave method of joint measurements of the frequency dependence of the complex permittivity, the frequency dependence of the complex magnetic permeability, and the thickness of plane
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41

Kussaiyn-Murat, Assel, Albina Kadyroldina, Alexander Krasavin, et al. "Application of Discrete Exterior Calculus Methods for the Path Planning of a Manipulator Performing Thermal Plasma Spraying of Coatings." Sensors 25, no. 3 (2025): 708. https://doi.org/10.3390/s25030708.

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This paper presents a new method of path planning for an industrial robot manipulator that performs thermal plasma spraying of coatings. Path planning and automatic generation of the manipulator motion program are performed using preliminary 3D surface scanning data from a laser triangulation distance sensor installed on the same robot arm. The new path planning algorithm is based on constructing a function of the geodesic distance from the starting curve. A new method for constructing a geodesic distance function on a surface is proposed, based on the application of Discrete Exterior calculus
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42

Bolzon, Gabriella, and Ruohan Zhang. "Fragmentation of Corrosion Protection Coatings: A Combined Finite-element Discrete-element Study." Procedia Engineering 109 (2015): 3–7. http://dx.doi.org/10.1016/j.proeng.2015.06.201.

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43

Fan, Ming, Thipnakarin Boonfueng, Ying Xu, Lisa Axe, and Trevor A. Tyson. "Modeling Pb sorption to microporous amorphous oxides as discrete particles and coatings." Journal of Colloid and Interface Science 281, no. 1 (2005): 39–48. http://dx.doi.org/10.1016/j.jcis.2004.08.050.

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44

Kuan, W. H., S. L. Lo, and M. K. Wang. "pH effect on the surface and bulk characteristics of metallic cations/SiO2 suspensions." Water Science and Technology 42, no. 3-4 (2000): 441–46. http://dx.doi.org/10.2166/wst.2000.0416.

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Анотація:
The surface and bulk properties of Al(III)/SiO2 and Fe(III)/SiO2 suspensions were determined as a function of prepared pH. The TEM results showed that Al(III) tends to form Al(OH)3 coatings on the surface of SiO2 while Fe(III) tends to form the discrete Fe(OH)2 phase in bulk solution with system pH increase. The charge reversals (CR) observed in the Al(III)/SiO2 system represent, in order of increasing pH, the point-of-zero charge (PZC) on the SiO2 substrate (CR1), the pH of surface nucleation of Al(OH)3 (CR2), and, at high pH, the PZC of the Al(OH)3 coating (CR3). The observed electrophoresis
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45

Li, Chichao, Chengrui Zhang, Minghua Xiang, Qing Chen, Zhenyang Luo, and Yanlong Luo. "Numerical Simulation of Flow Characteristics for Supercritical CO2-Sprayed Polyurethane Resin." Polymers 16, no. 7 (2024): 940. http://dx.doi.org/10.3390/polym16070940.

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Анотація:
Conventional paint spraying processes often use small molecule organic solvents and emit a large amount of volatile organic compounds (VOCs) that are highly toxic, flammable, and explosive. Alternatively, the spraying technology using supercritical CO2 (scCO2) as a solvent has attracted attention because of its ability to reduce VOC emissions, but the flow characteristics of coatings have not been thoroughly studied. Therefore, we numerically simulate the spraying process based on the actual process of scCO2 spraying polyurethane coatings by computational fluid dynamics (CFD). The effects of i
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46

Chowdhury, Md Abu Raihan, and David M. Singer. "Complex Speciation and Distribution of Iron, Sulfur, and Trace Metals in Coal Mine Soils Reflect Grain- and Sub-Grain-Scale Heterogeneity during Pyrite Oxidative Dissolution." Soil Systems 8, no. 1 (2023): 2. http://dx.doi.org/10.3390/soilsystems8010002.

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Анотація:
Historical coal mining practices have caused various soil and water hazards, particularly through the dumping of mine waste. The primary environmental risk associated with this waste is the leaching of toxic metals from dumps of spoil or refuse into the subsurface soil or into nearby water resources. The extent of metal release is controlled via the oxidative dissolution of pyrite and potential re-sequestration through secondary Fe oxides. The characterization of the dominant Fe-bearing phase and the distribution of trace metals associated with these phases was determined via electron microsco
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47

Fitz-Gerald, J. M., R. K. Singh, H. Gao, et al. "Novel method for the synthesis of thin film coatings on particulate materials." Journal of Materials Research 14, no. 8 (1999): 3281–91. http://dx.doi.org/10.1557/jmr.1999.0444.

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Анотація:
In this paper, we show the feasibility of the pulsed-laser ablation technique to grow 20–30-nm-thick, discrete and continuous coatings on particulate material systems so that the properties of the core particles can be suitably modified. Experiments were conducted with a pulsed excimer laser (λ = 248 nm, pulse duration = 25 ns) to deposit nanoparticle coatings on Al2O3 and SiO2 core particles by irradiation of Ag and Y2O3–Eu3+ sputtering targets. Structural characterization was performed with scanning electron microscopy, wavelength dispersive x-ray mapping, transmission electron microscopy, a
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48

Wu, H., M. Tan, W. Zhu, and Z. S. Ma. "The Interaction between Erosion Particle and Gas Stream in High Temperature Gas Burner Rig for Thermal Barrier Coatings." High Temperature Materials and Processes 38, no. 2019 (2019): 125–34. http://dx.doi.org/10.1515/htmp-2017-0172.

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AbstractThermal barrier coatings (TBCs) as a kind of temperature-resistance materials have been widely applied in super high temperature components in aircraft engines. However, TBCs are subjected to harsh service environment such as high temperature oxidation and erosion, which lead to the coating failure. It is important to investigate the effect of fire temperature, angle and velocity of particle on erosion to understand the failure mechanism. In this paper, the temperature and velocity distributions of erosion particles in high temperature gas burner rig are investigated by using the fluid
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49

Choi, Eun Byeol, and Jong-Hyun Lee. "Preparation of Submicroscale Ag-Coated Cu Particles by Multi-Step Addition of Ag Plating Solution and Antioxidation Properties for Different Ag Shell Thicknesses." Archives of Metallurgy and Materials 62, no. 2 (2017): 1137–42. http://dx.doi.org/10.1515/amm-2017-0166.

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AbstractFor application as a low-cost conductive filler material, submicroscale Cu@Ag particles were fabricated at room temperature without any reductants by a multi-step addition method using an ethylene glycol-based Ag plating solution. Scanning electron microscopy images of the Ag-coated Cu particles demonstrated the formation of discrete Ag particles less than 100 nm in size as well as a thin Ag coating on Cu particles, during the early addition steps. However, as the thickness of the Ag coating increased, the small Ag particles agglomerated into Ag coatings with an increase in the number
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50

Zhang, Jian, Sugrim Sagar, Tejsh Dube, et al. "Modeling of machining process of EB-PVD ceramic coatings using discrete element method." CIRP Journal of Manufacturing Science and Technology 38 (August 2022): 581–89. http://dx.doi.org/10.1016/j.cirpj.2022.05.018.

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