Microarc oxidation and spraying graphite duplex coating formed on titanium alloy for antifriction purpose

被引：53

作者：

Wang, YM ^{[1
]}

Jiang, BL

Lei, TQ

Guo, LX

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Inst Adv Ceram, Harbin 150001, Peoples R China

[2] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2005年 / 246卷 / 1-3期

关键词：

Ti6Al4V alloy; microarc oxidation; spraying graphite; duplex coating; microstructure; antifriction property;

D O I：

10.1016/j.apsusc.2004.11.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Microarc oxidation coatings were fabricated on Ti6Al4V alloy in NaAlO2 containing solution. Microstructure and adhesion properties of the coatings were evaluated. For antifriction purpose, a novel duplex coating of microarc oxidation combined with spraying graphite process was developed. The results show that the microarc oxidation coating with 20 mu m thickness is compact and uniform in the inner layer, while porous in the surface layer. The coating has high adhesion strength of about 110 MPa to the substrate. The novel duplex coating exhibits good antifriction property, registering friction coefficient of approximate to 0.12, which is 5 times lower than that of the microarc oxidation coating sliding in the similar condition. The good tribological property is attributed to the specially designed duplex structure, the coating adhering strongly to the substrate and serving as the underlying loading layer and the graphite layer on top of it working as solid lubricant. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：214 / 221

页数：8

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