High-temperature tribological behavior of a NiCoCrAlY/ZrO2 duplex coating on γ-TiAl alloy

被引：0
作者：
Ding, Zheng [1 ]
Miao, Qiang [1 ]
Liang, Wenping [1 ]
Yang, Zhengang [1 ]
An, Hao [1 ]
Yi, Jinwei [1 ]
Lin, Hao [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211100, Jiangsu, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 08期
基金：
中国国家自然科学基金;
关键词：
NiCoCrAlY/ZrO2 duplex coating; high temperature; gamma-TiAl alloy; friction coefficient; wear mechanism; THERMAL BARRIER COATINGS; TI-6AL-4V ALLOY; TITANIUM-ALLOY; SLIDING WEAR; FRICTION; ALUMINA; BLADES;
D O I：
10.1088/2053-1591/ab28f8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A dense NiCoCrAlY/ZrO2 duplex coating was deposited onto the gamma-TiAl alloy by magnetron sputtering technology for the purpose of improving its friction and wear properties at high temperature. Some tests of the ball-on-disk type that were against Si3N4 counterpart, were performed at room temperature and 500 degrees C. The average friction coefficients as well as the wear rates of NiCoCrAlY/ZrO2 duplex coatings were greatly less than those of substrates at both temperatures. Besides, the H/E and H-3/E-2 value of the NiCoCrAlY/ZrO2 coatings were much higher than that of the substrate. The excellent wear-resisting property of NiCoCrAlY/ZrO2 duplex coating was caused by the synergistic effect of its high hardness and outstanding plastic-deformation resistance.
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页数：8
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