Effect of load on current-carrying friction and wear performance and stability of AuNi9/PdNi-Au friction pair
YU Xinyue1, MA Zhifei2, ZHANG Lei1, ZHANG Xin1, KANG Xiao1,3
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. Aerospace System Engineering Shanghai, Shanghai 201109, China; 3. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Abstract：The stability of friction and wear properties of current-carrying friction pair determines the service performance and life of the mechanism. In this paper, AuNi9/PdNi-Au friction pair with the advantages of low contact resistance and low electrical noise was selected. The current friction stability of the friction pair under 180, 280 and 380 mN loads was studied by multiple statistical evaluation indexes such as friction coefficient, contact voltage drop curve, relative stability coefficient, standard deviation and frequency distribution. The results show that when the load is 180 mN, the wear mechanism of the AuNi9 brush is mainly adhesive wear and abrasive wear. The wear mechanism of the brush is mainly fatigue wear and abrasive wear when the load increases to 380 mN. With the increase of the load, the friction stability of the AuNi9/PdNi-Au friction pair first increases and then decreases, and the electrical contact stability increases gradually. When the load is 280 mN, the average friction coefficient is 0.330, the standard deviation is 0.180, the average contact voltage drop is 89.723 mV, the standard deviation is 41.419 mV, and the brush surface roughness is 0.207 μm, all are the minimum values under three kinds of loads. The friction pair shows good current carrying friction stability.
于芯悦, 马志飞, 张雷, 张鑫, 康潇. 载荷对AuNi9/PdNi-Au摩擦副载流摩擦磨损性能与稳定性的影响[J]. 粉末冶金材料科学与工程, 2022, 27(6): 648-658.
YU Xinyue, MA Zhifei, ZHANG Lei, ZHANG Xin, KANG Xiao. Effect of load on current-carrying friction and wear performance and stability of AuNi9/PdNi-Au friction pair. Materials Science and Engineering of Powder Metallurgy, 2022, 27(6): 648-658.
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2022, Vol. 27 
