Anti-friction mechanism of VAlTiCrMo high-entropy alloy coatings through tribo-oxidation inducing layered oxidic surface

被引：28
作者：
Fan, Jun [1 ,2 ]
Liu, Xuesong [1 ,3 ]
Pu, Jibin [1 ]
Shi, Yanbin [1 ,2 ]
机构：
[1] Chinese Acad Sci, Key Lab Marine Mat & Related Technol, Key Lab Marine Mat & Protect Technol Zhejiang Pro, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Guangxi Univ, Coll Chem & Chem Engn, Nanning 530004, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2022年 / 171卷
基金：
中国国家自然科学基金;
关键词：
Coating; High temperature friction; Antifriction; Oxide; Wear resistance; HIGH-TEMPERATURE; TRIBOLOGICAL PROPERTIES; BEHAVIOR; WEAR; FILMS; SCATTERING; CATALYSTS; FRICTION; NITRIDE;
D O I：
10.1016/j.triboint.2022.107523
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
VAlTiCrMo-based high-entropy alloy coatings with BCC structure were successfully prepared by magnetron sputtering, and the tribological properties were improved by changing Mo content. It is revealed that friction force changed the composition of lubricating phase in the oxide scale of VAlTiCrMo1.6 coating, that is, a complex oxide Al-2(MoO4)(3) as dominant lubricating phase was formed on the surface of oxide scale through tribochemical reaction between simple oxides. And the phase separation in the layered oxide scale caused by thermal diffusion, which is favorable to form continuous lubricating film during friction, was the prerequisite for VAlTiCrMo1.6 coating to acquire low friction and wear. In this process, the addition of Mo played a key role in uphill diffusion and segregation of elements.
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页数：11
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