Abstract：The friction and wear characteristics of Cu-based powder metallurgy friction materials were evaluated on a space friction testing machine at high load (400 N) in vacuum at room temperature. The reliability life and wear mechanism of friction materials were investigated and revealed respectively. The experimental results show that there are three stages during the friction process. At the first stage, the friction coefficient increases from 0.28 to 0.61, and the abrasive wear is the dominant wear mechanism. In the second stage, the friction coefficient remains steadily (~0.61), and the dominant wear mechanism is the mixture of abrasive wear and adhesive wear. At the third stage, the friction coefficient begins to decrease. The dominant wear mechanism transforms to be the mixture adhesive wear and severe fatigue wear, leading to the material failure. During the test, the stability friction coefficient keeps up 0.9. The friction pairs can meet the demand of indexing mechanism and space manipulator in vacuum at room temperature.
钟爱文, 姚萍屏, 肖叶龙, 周海滨, 樊坤阳, 贡太敏, 凌攀, 刘超. 真空常温下空间用铜基粉末冶金摩擦材料的摩擦学行为及可靠性寿命[J]. 粉末冶金材料科学与工程, 2018, 23(1): 110-118.
ZHONG Aiwen, YAO Pingping, XIAO Yelong, ZHOU Haibin, FAN Kunyang, GONG Taimin, LING Pan, LIU Chao. Tribological behaviors and reliability life of Cu-based friction materials for space applications in vacuum at room temperature. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 110-118.
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2018, Vol. 23 
