摘要
采用扫描电子显微镜、微区电子探针及 X射线光电子能谱等分析测试技术考察了金 -稀土合金电刷丝摩擦副的磨损机理 .结果表明 :该摩擦副的摩擦磨损机理为轻微粘着磨损 ;合金中稀土元素发生偏聚 ;在摩擦升温过程中 ,稀土元素向合金表面扩散富集 ,摩擦副接触表面氧化层不断生成和磨损 ,从而降低电刷丝的表面能 ,使摩擦副的接触表面粘着能降低 。
The morphology, elemental distribution, and chemical states of some typical elements on the original and worn surface of Au-rare earth alloy wire in sliding against Cu40NiZnMnCe alloy ring were investigated by means of scanning electron microscopy, electron probe microanalysis and X-ray photoelectron spectrometry. Then the wear mechanism of the Au-rare earth alloy wire was discussed based on the related surface analytical results. It was found that the alloy wire was characterized by slight adhesion wear and oxidation at extended test duration. The rare-earth elements in the alloy wire diffused onto the surface and segregated at Au-rich zones owing to the temperature rising during the sliding process. The elements Cu and Ni were oxidized in the sliding process, with the formation of Cu2O and Ni2O3, while the friction did not lead to the change of the chemical state of Au. The oxidized products helped to keep off the frictional pair contact, and hence to decrease the surface energy of the alloy wire. This partly accounted for the decrease in the friction coefficient and the wear rate of the Au-rare earth alloy wire in sliding against Cu40NiZnMnCe alloy ring.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2002年第4期282-285,共4页
Tribology
基金
云南省应用基础青年基金项目 (96Q10 6E)
