Preparation and wide temperature range tribological behavior of VN-Ag-MoO3 composites

被引：0
|
作者：
Wang L. [1 ]
Chen S. [1 ,2 ]
Liu E. [1 ]
Du S. [1 ]
Du H. [1 ]
Cai H. [1 ]
机构：
[1] School of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an
[2] Xi'an Aviation Brake Technology CO. LTD., Xingping
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 12期
关键词：
Nonmetallic matrix composites; Oxide; Tribology; Vacuum sintering; Wide temperature range tribological behavior;
D O I：
10.13801/j.cnki.fhclxb.20210208.001
中图分类号：
学科分类号：
摘要：
VN-Ag-MoO3 composites were prepared by vacuum hot pressing sintering. The effects of Ag2MoO4 on the microstructure and wide temperature range friction and wear properties of VN matrix composites were investigated. The results show that the structure of VN-Ag-MoO3 composite is relatively compact, mainly composed of VN, MoO3 and Ag, and the MoO3 and Ag distributed evenly in VN matrix are formed by the decomposition of Ag2MoO4 at high temperature. Friction and wear tests in a wide temperature range show that the addition of Ag2MoO4 can effectively improve the friction and wear properties of VN ceramics in the temperature range of room temperature (RT)-700℃. The friction coefficient (0.285) and wear rate (1.37×10−5 mm3/(N·m)) of VN-10Ag-MoO3 with 10wt% Ag2MoO4 at 700℃ are 23% and 72% lower than those of VN, respectively, which are attributed to the excellent lubrication and wear reduction effects of high temperature lubrication phases such as vanadium oxide, silver vanadate and silver molybdate on the wear surface. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：4212 / 4219
页数：7
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