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

Affiliation of Author(s):材料科学与技术学院

Journal:Surf Eng

Abstract:A Zr–Y alloyed layer was prepared onto the surface of γ-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 μm. The nano-indentation test result showed that the nano-hardness of Zr–Y alloyed layer was 2.35 times that of γ-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°C. Under dry sliding condition, the friction coefficient of the Zr–Y alloyed layer was lower than that of the γ-TiAl. The specific wear rate of γ-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. © 2017 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.

Volume:33

Issue:12

Page Number:911-918

ISSN No.:0267-0844

Translation or Not:no

Date of Publication:2017-12-02

Included Journals:EI

Date of Publication:2017-12-02