摘要
利用真空热压烧结技术制备了VN-Ag-MoO_(3)复合材料,研究了Ag_(2)MoO_(4)对VN基复合材料组织结构及宽温域摩擦磨损性能的影响。结果表明:VN-Ag-MoO_(3)复合材料组织较致密,主要由VN、MoO_(3)和Ag组成,其中均匀分布于VN基体的MoO_(3)和Ag由Ag_(2)MoO_(4)经高温分解形成。宽温域摩擦磨损测试表明,Ag_(2)MoO_(4)的添加有效改善了室温(RT)~700℃温域范围VN陶瓷的摩擦磨损性能。其中,700℃时Ag_(2)MoO_(4)含量为10wt%的VN-10Ag-MoO_(3)的摩擦系数(0.285)和磨损率(1.37×10^(−5) mm^(3)/(N·m))分别较VN降低了23%和72%,这归因于磨损表面的氧化钒、钒酸银和钼酸银等高温润滑相起到了优异的润滑及减磨作用。
VN-Ag-MoO_(3) composites were prepared by vacuum hot pressing sintering.The effects of Ag_(2)MoO_(4) 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-MoO_(3) composite is relatively compact,mainly composed of VN,MoO_(3) and Ag,and the MoO_(3) and Ag distributed evenly in VN matrix are formed by the decomposition of Ag_(2)MoO_(4) at high temperature.Friction and wear tests in a wide temperature range show that the addition of Ag_(2)MoO_(4) 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) mm^(3)/(N·m))of VN-10Ag-MoO_(3) with 10wt%Ag_(2)MoO_(4) 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.
作者
王丽萍
陈树
刘二勇
杜双明
杜慧玲
蔡辉
Liping WANG;Shu CHEN;Eryong LIU(Shuangming DU1,,Huiling DU1,,Hui CAI1,1.School of Materials Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Xi’an Aviation Brake Technology CO.LTD.,Xingping 713100,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2021年第12期4212-4219,共8页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51705415)
中科院海洋新材料与应用技术重点实验室开放课题(2018K01)
陕西省重点研发计划项目(2020GY-115)。
关键词
非金属基复合材料
氧化物
真空烧结
宽温域摩擦磨损性能
摩擦学
nonmetallic matrix composites
oxide
vacuum sintering
wide temperature range tribological behavior
tribology
