Tribological properties of Cu-La_2O_3 composite under different electrical currents  

作　　者：郑润国 战再吉 王文魁 

机构地区：[1]State Key Laboratory of Metastable Materials Science&Technology,School of Science&Technology,Yanshan University

出　　处：《Journal of Rare Earths》2011年第3期247-252,共6页稀土学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(50731005)

摘　　要：A new type of Cu-La2O3 composite was fabricated by internal oxidation method using powder metallurgy.Sliding wear behavior of the Cu-La2O3 composite was studied on a pin-on-disc wear tester under various electrical currents and applied loads.The worn surfaces were characterized using scanning electron microscopy and energy dispersive spectroscopy to probe the wear mechanisms.The results indicated that applied load had a significant effect on the wear rate of the Cu-La2O3 composite pins.The wear rate displayed the minimum value at the load of 50 N during electrical sliding processes.The corresponding wear mechanism was identified to be adhesive wear,abrasive wear,oxidation wear and arc erosion.A new type of Cu-La2O3 composite was fabricated by internal oxidation method using powder metallurgy.Sliding wear behavior of the Cu-La2O3 composite was studied on a pin-on-disc wear tester under various electrical currents and applied loads.The worn surfaces were characterized using scanning electron microscopy and energy dispersive spectroscopy to probe the wear mechanisms.The results indicated that applied load had a significant effect on the wear rate of the Cu-La2O3 composite pins.The wear rate displayed the minimum value at the load of 50 N during electrical sliding processes.The corresponding wear mechanism was identified to be adhesive wear,abrasive wear,oxidation wear and arc erosion.

关 键 词：sliding wear electrical contacts arc discharge rare earths 

分 类 号：TB331[一般工业技术—材料科学与工程]