Tribological behaviour of double-glow plasma zirconium-yttrium alloying on gamma-TiAl

Affiliation of Author(s):材料科学与技术学院

Journal:SURFACE ENGINEERING

Key Words:gamma-TiAl plasma surface alloying Zr-Y alloyed layer tribological behaviour

Abstract:A Zr-Y alloyed layer was prepared onto the surface of gamma-TiAl using double-glow plasma surface alloying technique (DG technique). The results showed that the Zr-Y alloyed layer was comprised of deposited sub-layer and diffused sub-layer, with a total layer thickness of about 20 mu m. The nano-indentation test result showed that the nano-hardness of Zr-Y alloyed layer was 2.35 times that of gamma-TiAl. The scratch test was carried to evaluate the adhesion strength of Zr-Y alloyed layer. The tribological behaviours were investigated both at ambient temperature and 500 degrees C. Under dry sliding condition, the friction coefficient of the Zr-Y alloyed layer was lower than that of the gamma-TiAl. The specific wear rate of gamma-TiAl in the presence of Zr-Y alloyed layer was approximately one fifth that in the absence of the alloyed layer. The excellent wear resistance of Zr-Y alloyed layer could be attributed to the high hardness or load-carrying ability.

ISSN No.:0267-0844

Translation or Not:no

Date of Publication:2017-01-01

Co-author:Huang, Cong,Wei Dongbo,Wei, Xiangfei,Chen, Xiaohu,Ding, Feng

Correspondence Author:Zhang Pingze

Date of Publication:2017-01-01