Tribological Behavior of Ni-based Self-lubricating Composites with the Addition of Ti3SiC2 and Ag2W2O7  

作　　者：FENG Siping ZHOU Xincong ZHANG Qiaoxin 冯四平;ZHOU Xincong;ZHANG Qiaoxin(Reliability Engineering Institute,School of Energy and Power Engineering,Wuhan University of Technology,Wuhan430063,China;Key Laboratory of Marine Power Engineering and Technology(Ministry of Transportation),Wuhan University of Technology,Wuhan430063,China;School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan430070,China)

机构地区：[1]Reliability Engineering Institute,School of Energy and Power Engineering,Wuhan University of Technology,Wuhan430063,China [2]Key Laboratory of Marine Power Engineering and Technology(Ministry of Transportation),Wuhan University of Technology,Wuhan430063,China [3]School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第3期698-706,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China(No.51805183)

摘　　要：The tribological properties of Nickel-based composites containing Ti3 SiC2 and Ag2 W2 O7 fabricated by spark plasma sintering against Si3 N4 balls were investigated using a ball-on-disk tribometer from room temperature to 600 ℃. The tribolayers formed on the friction surface and their effects on the tribological properties of composites at different temperatures were discussed based on the worn surface characterization. The results show that Ag2 W2 O7 is decomposed into metallic silver and CrWO4 during the high-temperature fabrication process. The composite with the addition of 20 wt% Ti3 SiC2 and 5 wt% Ag2 W2 O7 exhibits a friction coefficient of 0.33-0.49 and a wear rate of 7.07×10-5-9.89×10-5 mm3/（Nm） over a wide temperature range from room temperature to 600 ℃. The excellent tribological properties at a wide temperature range are attributed to the formation of a glaze layer at low temperature and a tribooxide layer at high temperature, which can provide a low shearing strength for the synergistic effects of Ag and tribooxides.The tribological properties of Nickel-based composites containing Ti3SiC2 and Ag2W2O7 fabricated by spark plasma sintering against Si3N4 balls were investigated using a ball-on-disk tribometer from room temperature to 600℃. The tribolayers formed on the friction surface and their effects on the tribological properties of composites at different temperatures were discussed based on the worn surface characterization. The results show that Ag2W2O7 is decomposed into metallic silver and CrWO4 during the high-temperature fabrication process. The composite with the addition of 20 wt% Ti3SiC2 and 5 wt% Ag2W2O7 exhibits a friction coefficient of 0.33-0.49 and a wear rate of 7.07x 10~5-9.89x 10~5 mm3/(Nm) over a wide temperature range from room temperature to 600℃. The excellent tribological properties at a wide temperature range are attributed to the formation of a glaze layer at low temperature and a tribooxide layer at high temperature, which can provide a low shearing strength for the synergistic effects of Ag and tribooxides.

关 键 词：nickel-based composite SELF-LUBRICATION wear TRIBOLAYER SYNERGISTIC effect 

分 类 号：TB[一般工业技术]