Effects of aluminosilicate particles on tribological performance and friction mechanism of Cu-matrix pads for high-speed trains

The effects and mechanism of mullite and kyanite on the friction and wear of copper-based brake pads for high-speed trains were studied. The braking performance was tested at different speeds using a pin-disc tester. The physical properties, element distribution and tribo-film formation were investi...

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Bibliographic Details
Published in:Tribology international 2023-01, Vol.177, p.107983, Article 107983
Main Authors: Xu, Zhuoyuan, Zhong, Min, Xu, Wenhu, Xie, Guoxin, Hu, Haijun
Format: Article
Language:English
Subjects:
Aluminosilicate particles
Copper-based pads
High-speed trains
Tribo-film
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Summary:The effects and mechanism of mullite and kyanite on the friction and wear of copper-based brake pads for high-speed trains were studied. The braking performance was tested at different speeds using a pin-disc tester. The physical properties, element distribution and tribo-film formation were investigated using the hardness tester, density meter, SEM, EDS and XRD. The results showed that the braking performance of materials with 1% kyanite was optimal. The friction coefficient was the most stable and the wear rate reduces over 30%. Kyanite can promote the formation of primary platform and mechanical mixing layer, thus accelerating the tribo-film generation to protect the surface. Moreover, the wear mechanism was elucidated by characterizing the changes of worn surface, wear debris and tribo-film.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2022.107983