Composition design of Ni-nano-Al2O3-PTFE coatings and their tribological characteristics

SURFACE & COATINGS TECHNOLOGY

卷:282

Article

Tang, Aigui¹  Wang, Meiling^1,2  Huang, Wei^1,2  Wang, Xiaolei^1,2 

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Jiangsu, Peoples R China

[2] Jiangsu Key Lab Precis & Micromfg Technol, Nanjing 210016, Jiangsu, Peoples R China

关键词: Ni-nano-Al2O3-PTFE composite coating;    Electrophoretic co-deposition;    Electrodeposition;    Friction;    Wear;   

DOI  :  10.1016/j.surfcoat.2015.10.034

来源: Elsevier

【 摘 要 】

The Ni-nano-Al2O3-PTFE composite coatings were prepared by the electrophoretic-electrochemical deposition method. A uniform film of the nano-Al2O3 and PTFE particles was first electrophoretically co-deposited on the substrate of copper. Then, nickel was electro-deposited on the substrate covering with the film of these particles. Using the electrophoretic-electrochemical deposition method can remarkably increase the particle content in the composite coatings. Under certain conditions, the contents of Al2O3 and PTFE particles in the Ni-nano-Al2O3-PTFE composite coating can reach 26.57 wt.% and 13.79 wt.%, respectively. The results of friction and wear tests showed that the Ni-PTFE composite coating exhibited the lowest friction and the Ni-nano-Al2O3 composite coating possessed the best wear resistance. By optimizing the content ratio of nano-Al2O3 and PTFE particles, the composite coating of Ni-nano-Al2O3-PTFE displays preferable low friction and anti-wear behavior. (C) 2015 Elsevier B.V. All rights reserved.

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