Tribological properties of plasma-sprayed nickel alloy matrix self-lubricating coating at elevated temperatures  

作　　者：Wen-Sheng Li Yang Sun Wei Hu Sheng-Yu Zhu Hai-Min Zhai Jun Yang Xiang-Juan Fan Wei-Min Liu 

机构地区：[1]State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China [2]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Rare Metals》2021年第7期1844-1850,共7页稀有金属（英文版）

基　　金：the International Science and Technology Cooperation Program of China(No.2015DFR51090);the National Program on Key Research Project of China(No.2016YFE0111400)。

摘　　要：A nickel alloy matrix high-temperature self-lubricating coating(77.5 wt%(Ni-Cr-Mo-Al)-12.5 wt%Ag-10 wt%BaF2/CaF2)was prepared by plasma spraying technique.Results show that the Vickers microhardness of coating is(2.9±0.5)GPa,and the average bonding strength is about(35.6±0.5)MPa.The coating rubbing against Inconel 718 superalloy pin exhibits superior tribological performance with coefficient of friction(COF)of below 0.25 and wear rate of 8.2×10^(-5)-15.2×10^(-5)mm^(3)·N^(-1)·m^(-1)at a wide temperature range from 25 to 800℃,and the COF and the wear rate are slightly reduced with temperature increasing.The low COF and wear rate were attributed to the synergistic effects of Ag,BaF_(2)/CaF_(2),Ag2MoO_(4)and BaMoO_(4).

关 键 词：COATING Tribological behavior High temperature SELF-LUBRICATING 

分 类 号：V317[航空宇航科学与技术—航空宇航推进理论与工程] V519[金属学及工艺—金属表面处理] TG174.4[金属学及工艺—金属学]