Nb-Ti-Si-Cr基超高温合金及其表面Zr-Y联合改性硅化物渗层的摩擦磨损性能

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 26; no. 7; pp. 1892 - 1901
Main Author 李轩 郭喜平 乔彦强
Format Journal Article
LanguageEnglish
Published 2016
Subjects
Nb-Ti-Si-Cr基合金
Zr-Y改性硅化物渗层
摩擦磨损
磨损机制
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Bibliography:Xuan LI, Xi-ping GUO, Yan-qiang QIAO（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China）
43-1239/TG
Zr-Y jointly modified silicide coatings were prepared on an Nb-Ti-Si-Cr based ultrahigh temperature alloy by pack cementation process. The wear behaviors of both the base alloy and coatings were comparatively studied at room temperature and 800 ℃ using SiC balls as the counterpart. The Zr-Y jointly modified silicide coating is mainly composed of a thick （Nb,X）Si2 outer layer and a thin （Ti,Nb）5Si4 inner layer. The coatings possess much higher microhardness than the base alloy. The wear rates of both the base alloy and coatings increase with increasing the sliding loads. However, the coatings have much lower wear rates than the base alloy under the same sliding conditions. The coatings have superior anti-friction property, and can provide effective protection for the base alloy at both room temperature and 800 ℃ in air.
Nb-Ti-Si-Cr based alloy;Zr-Y modified silicide coating;friction and wear;wear mechanism
ISSN:1003-6326