Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4986491 | Wear | 2017 | 19 Pages |
Abstract
To obtain a sliding contact strip material with good electrical conductivity and wear resistance, carbon fibre/copper fibre-reinforced carbon matrix composite (Cf/Cuf-C composites) with and without flaky graphite were fabricated using a chemical vapor infiltrated process (CVI) and impregnation technique. The microstructure and mechanical and electrical properties of the composites, as well as those of a carbon composite used in contact strip of china high-speed railways in China, were investigated. The wear behavior of the three composites were investigated using a pin-on-disc-type wear tester with electrical current. The wear test was carried out under an AC electrical current of 50Â A with a normal load of 70 N and sliding speeds ranging from 10 to 30Â m/s. The results indicated that the Cf/Cuf-C composite with flaky graphite had several advantages in mechanical and electrical properties. The carbon composite is more easily worn when the sliding speed was higher than 20Â m/s. At a sliding speed of 30Â m/s, the wear rate of the Cf/Cuf-C composite with flaky graphite was 3.22Â mg/km, which is only two-thirds that of the carbon composite.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Pei Wang, Hongbo Zhang, Jian Yin, Xiang Xiong, Cui Tan, Chaoyong Deng, Zhiqiao Yan,