Wear mechanism of Cu-based brake pad for high-speed train braking at speed of 380 km/h

被引：88

作者：

Xiao, Jin-Kun ^{[1
]}

Xiao, Shu-Xian ^{[1
]}

Chen, Juan ^{[2
]}

Zhang, Chao ^{[1
]}

机构：

[1] Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Jiangsu, Peoples R China

[2] Yangzhou Univ, Testing Ctr, Yangzhou 225009, Jiangsu, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2020年 / 150卷

基金：

中国国家自然科学基金;

关键词：

Metal matrix composite; Brake pad; Wear mechanism; Tribolayer; METAL-MATRIX COMPOSITES; BEHAVIOR; FRICTION; MICROSTRUCTURE; PERFORMANCE; RAIL; DRY;

D O I：

10.1016/j.triboint.2020.106357

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Cu-based brake pads for high-speed train were tested in full-scale at braking speeds as high as 380 km/h. The microstructure, composition and properties of the original, worn and lateral surfaces were investigated. The results show that a similar to 2 mu m thick nanostructured tribolayer composed of CuO and Fe2O3 was formed on the worn surface, owing to the plastic deformation, mechanical mixing, oxidation and sintering processes. The tribolayer enables significantly higher friction coefficient and wear resistance than original surface, which can be attributed to oxide-based composition and high hardness. The graphite particles in the worn and lateral surfaces were burned and the copper matrix was oxidized. The tribological property of brake pad highly depends on the composition and microstructure of the tribolayer.

引用

页数：8

共 32 条

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