Preparation and properties of CNT/Sn-Pb composite coating

2014 ◽  
pp. 25-30
Keyword(s):  
Composite Coating

Microstructure of SiC/Al composite coating by CO2 laser cladding

2004 ◽  
Author(s):  
Yang Xi-Chen ◽  
Li Hui-Shan ◽  
Wang Yun-Shan ◽  
Ma Bing ◽  
Yi Ying-Hui
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Co2 Laser ◽  
Al Composite

Laser Cladding of Hard TiO xN y/Ti Composite Coating on Ti Alloy

2020 ◽  
Author(s):  
Yitian Zhao ◽  
Mingyuan Lu ◽  
Zhiqi Fan ◽  
Qiyang Tan ◽  
Han Huang
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Ti Alloy

Electrochemical behaviour of chromium–graphene composite coating

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62083-62090 ◽  
Author(s):  
Rekha M. Y. ◽  
M. K. Punith Kumar ◽  
Chandan Srivastava
Keyword(s):  
Composite Coating ◽  
Zno Nanoparticles ◽  
Electrochemical Behaviour ◽  
Chromium Coating ◽  
Corrosion Resistant ◽  
Graphene Composite ◽  
Pure Chromium

This work illustrates the role of graphene in enhancing the corrosion resistant properties of chromium–graphene composite coating when compared to the corrosion resistant properties of pure chromium coating containing ZnO nanoparticles.

scholarly journals Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1233
Author(s):  
Yuchao Zhao ◽  
Nan Ye ◽  
Haiou Zhuo ◽  
Chaolong Wei ◽  
Weiwei Zhou ◽  
...  
Keyword(s):  
Composite Coating ◽  
Duty Cycle ◽  
Electrode Materials ◽  
Pulse Current ◽  
Electrical Discharge Machining ◽  
Composite Coatings ◽  
Electrical Contact ◽  
Pulse Plating ◽  
Fusion Welding ◽  
Raw Material

Tungsten-copper (W–Cu) composites are widely used as electrical contact materials, resistance welding, electrical discharge machining (EDM), and plasma electrode materials due to their excellent arc erosion resistance, fusion welding resistance, high strength, and superior hardness. However, the traditional preparation methods pay little attention to the compactness and microstructural uniformity of W–Cu composites. Herein, W–Cu composite coatings are prepared by pulse electroplating using nano-W powder as raw material and the influence of forward-reverse duty cycle of pulse current on the structure and mechanical properties is systematically investigated. Moreover, the densification mechanism of the W–Cu composite coating is analyzed from the viewpoints of forward-pulse plating and reverse-pulse plating. At the current density (J) of 2 A/dm2, frequency (f) of 1500 Hz, forward duty cycle (df) of 40% and reverse duty cycle (dr) of 10%, the W–Cu composite coating rendered a uniform microstructure and compact structure, resulting in a hardness of 127 HV and electrical conductivity of 53.7 MS/m.

scholarly journals Rear Earth Oxide Multilayer Deposited by Plasma Spray-Physical Vapor Deposition for Envisaged Application as Thermal/Environmental Barrier Coating

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 889
Author(s):  
Jie Zhong ◽  
Dongling Yang ◽  
Shuangquan Guo ◽  
Xiaofeng Zhang ◽  
Xinghua Liang ◽  
...  
Keyword(s):  
Composite Coating ◽  
High Temperatures ◽  
Physical Vapor Deposition ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Environmental Barrier ◽  
Chemical Attack ◽  
Environmental Barrier Coating ◽  
Barrier Coating

SiC fiber-reinforced SiC ceramic matrix composites (SiCf/SiC CMCs) are being increasingly used in the hot sections of gas turbines because of their light weight and mechanical properties at high temperatures. The objective of this investigation was the development of a thermal/environmental barrier coating (T/EBC) composite coating system consisting of an environmental barrier coating (EBC) to protect the ceramic matrix composites from chemical attack and a thermal barrier coating (TBC) that insulates and reduces the ceramic matrix composites substrate temperature for increased lifetime. In this paper, a plasma spray-physical vapor deposition (PS-PVD) method was used to prepare multilayer Si–HfO2/Yb2Si2O7/Yb2SiO5/Gd2Zr2O7 composite coatings on the surface of SiCf/SiC ceramic matrix composites. The purpose of this study is to develop a coating with resistance to high temperatures and chemical attack. Different process parameters are adopted, and their influence on the microstructure characteristics of the coating is discussed. The water quenching thermal cycle of the coating at high temperatures was tested. The results show that the structure of the thermal/environmental barrier composite coating changes after water quenching because point defects and dislocations appear in the Gd2Zr2O7 and Yb2SiO5 coatings. A phase transition was found to occur in the Yb2SiO5 and Yb2Si2O7 coatings. The failure mechanism of the T/EBC composite coating is mainly spalling when the top layer penetrates cracks and cracking occurs in the interface of the Si–HfO2/Yb2Si2O7 coating.

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