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Aluminum Coating
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Arvind Agarwal – 1st expert on this subject based on the ideXlab platform
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Effect of 2D WS 2 Addition on Cold-Sprayed Aluminum Coating
Journal of Thermal Spray Technology, 2017Co-Authors: Archana Loganathan, Jeganathan Karthikeyan, Sara Rengifo, Alexander Franco Hernandez, Yusuf Emirov, Cheng Zhang, Benjamin Boesl, Arvind AgarwalAbstract:Tungsten disulfide (WS2) has excellent solid lubrication properties due to its 2D layered structure. This study focuses on depositing Al-2 wt.% WS2 composite Coating by cold spray technique. The effect of WS2 addition on the microstructure, mechanical and tribological properties of the composite Coatings is examined in the as-deposited and heat-treated conditions. After heat treatment, the Coating density increased to 99% with improved intersplat bonding. The microhardness of the heat-treated Al-2 wt.% WS2 Coating increased by 56% as compared to the as-sprayed Coating. The wear resistance of heat-treated Al-2 wt.% WS2 Coating improved by 75% with a synergistic reduction in the coefficient of friction (COF) by 51%. Transmission electron microscopy investigation reveals the presence of layered WS2 within Aluminum splats with a strong interface. This study shows that cold spraying can be effectively used to integrate 2D layered WS2 as a solid lubricant in the metallic Coatings.
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Microstructure and wear properties of Aluminum/Aluminum–silicon composite Coatings prepared by cold spraying
Surface & Coatings Technology, 2009Co-Authors: Srinivasa Rao Bakshi, Di Wang, Timothy Price, Deen Zhang, Anup Kumar Keshri, Yao Chen, D. Graham Mccartney, Philip H. Shipway, Arvind AgarwalAbstract:Abstract Composite Coatings containing Aluminum and Aluminum–11.6 wt.% silicon eutectic alloy phases of varying compositions were fabricated using cold spraying. Coating contained a uniform distribution of the two phases. The hardness of the Coatings increased as the volume fraction of Al–Si in the Coating increased. The length to width ratio of the splats was found to be larger for Al particles compared to Al–Si particles. Dry sliding ball-on-plate wear tests indicated that the wear volume loss was similar for the Al and Al/Al–Si composite Coatings in spite of the increase in microhardness. This discrepancy is explained by the inter-splat delamination mechanism. The coefficient of friction of Aluminum Coating reduced on Al–Si addition.
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Microstructure and wear properties of Aluminum/Aluminum-silicon composite Coatings prepared by cold spraying
Surface and Coatings Technology, 2009Co-Authors: Srinivasa Rao Bakshi, Di Wang, Timothy Price, Deen Zhang, Anup Kumar Keshri, Yao Chen, D. Graham Mccartney, Philip H. Shipway, Arvind AgarwalAbstract:Composite Coatings containing Aluminum and Aluminum-11.6 wt.% silicon eutectic alloy phases of varying compositions were fabricated using cold spraying. Coating contained a uniform distribution of the two phases. The hardness of the Coatings increased as the volume fraction of Al-Si in the Coating increased. The length to width ratio of the splats was found to be larger for Al particles compared to Al-Si particles. Dry sliding ball-on-plate wear tests indicated that the wear volume loss was similar for the Al and Al/Al-Si composite Coatings in spite of the increase in microhardness. This discrepancy is explained by the inter-splat delamination mechanism. The coefficient of friction of Aluminum Coating reduced on Al-Si addition. © 2009 Elsevier B.V. All rights reserved.
Jeganathan Karthikeyan – 2nd expert on this subject based on the ideXlab platform
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Effect of 2D WS 2 Addition on Cold-Sprayed Aluminum Coating
Journal of Thermal Spray Technology, 2017Co-Authors: Archana Loganathan, Jeganathan Karthikeyan, Sara Rengifo, Alexander Franco Hernandez, Yusuf Emirov, Cheng Zhang, Benjamin Boesl, Arvind AgarwalAbstract:Tungsten disulfide (WS2) has excellent solid lubrication properties due to its 2D layered structure. This study focuses on depositing Al-2 wt.% WS2 composite Coating by cold spray technique. The effect of WS2 addition on the microstructure, mechanical and tribological properties of the composite Coatings is examined in the as-deposited and heat-treated conditions. After heat treatment, the Coating density increased to 99% with improved intersplat bonding. The microhardness of the heat-treated Al-2 wt.% WS2 Coating increased by 56% as compared to the as-sprayed Coating. The wear resistance of heat-treated Al-2 wt.% WS2 Coating improved by 75% with a synergistic reduction in the coefficient of friction (COF) by 51%. Transmission electron microscopy investigation reveals the presence of layered WS2 within Aluminum splats with a strong interface. This study shows that cold spraying can be effectively used to integrate 2D layered WS2 as a solid lubricant in the metallic Coatings.
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Transmission electron microscopy of cold sprayed 1100 Aluminum Coating
Scripta Materialia, 2005Co-Authors: Kantesh Balani, Arvind Agarwal, Sudipta Seal, Jeganathan KarthikeyanAbstract:Cold-spraying of 1100 Al powder particles onto 1100 Al substrate was accomplished using carrier gases 100 vol.% He and a mixture of He–20 vol.% N2. TEM characterization correlates very well the occurrence of dislocations, presence of oxide, and surface instability phenomenon with observed mechanical and corrosion properties of the cold-sprayed Coating.
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effect of carrier gases on microstructural and electrochemical behavior of cold sprayed 1100 Aluminum Coating
Surface & Coatings Technology, 2005Co-Authors: Kantesh Balani, Jeganathan Karthikeyan, Arvind Agarwal, Thewarach Laha, Norman MunroeAbstract:Aluminum has been cold sprayed onto similar substrate using 100 vol.% He and mixture of He-20 vol.% N2 as carrier gases. Analysis and characterization of sprayed depositions under different processing conditions was performed through optical micrography, stereological analysis, scanning electron microscopy, and microhardness depth profiles. Potentiodynamic polarization curves and Tafel extrapolation experiments were carried at 0.9 pH value using sulfuric acid (H2SO4) as an electrolyte. Helium processing condition displayed more compact structure and higher hardness for the Coating when compared to He-20 vol.% N2 processing. Electrochemical studies depicted better corrosion resistance of the He-20 vol.% N2-processed Coatings when compared to Coatings processed with helium alone. D 2004 Elsevier B.V. All rights reserved.
Kantesh Balani – 3rd expert on this subject based on the ideXlab platform
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Transmission electron microscopy of cold sprayed 1100 Aluminum Coating
Scripta Materialia, 2005Co-Authors: Kantesh Balani, Arvind Agarwal, Sudipta Seal, Jeganathan KarthikeyanAbstract:Cold-spraying of 1100 Al powder particles onto 1100 Al substrate was accomplished using carrier gases 100 vol.% He and a mixture of He–20 vol.% N2. TEM characterization correlates very well the occurrence of dislocations, presence of oxide, and surface instability phenomenon with observed mechanical and corrosion properties of the cold-sprayed Coating.
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effect of carrier gases on microstructural and electrochemical behavior of cold sprayed 1100 Aluminum Coating
Surface & Coatings Technology, 2005Co-Authors: Kantesh Balani, Jeganathan Karthikeyan, Arvind Agarwal, Thewarach Laha, Norman MunroeAbstract:Aluminum has been cold sprayed onto similar substrate using 100 vol.% He and mixture of He-20 vol.% N2 as carrier gases. Analysis and characterization of sprayed depositions under different processing conditions was performed through optical micrography, stereological analysis, scanning electron microscopy, and microhardness depth profiles. Potentiodynamic polarization curves and Tafel extrapolation experiments were carried at 0.9 pH value using sulfuric acid (H2SO4) as an electrolyte. Helium processing condition displayed more compact structure and higher hardness for the Coating when compared to He-20 vol.% N2 processing. Electrochemical studies depicted better corrosion resistance of the He-20 vol.% N2-processed Coatings when compared to Coatings processed with helium alone. D 2004 Elsevier B.V. All rights reserved.
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Transmission electron microscopy of cold sprayed 1100 Aluminum Coating
Scripta Materialia, 2005Co-Authors: Kantesh Balani, Arvind Agarwal, Sudipta Seal, Jeganathan KarthikeyanAbstract:Cold-spraying of 1100 Al powder particles onto 1100 Al substrate was accomplished using carrier gases 100 vol.% He and a mixture of He-20 vol.% N2. TEM characterization correlates very well the occurrence of dislocations, presence of oxide, and surface instability phenomenon with observed mechanical and corrosion properties of the cold-sprayed Coating. ?? 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.