Quantitative evolution of tribo-layers in copper based friction materials for high-speed trains operating at 400 km/h equivalent energy density: Ratio of formation to damage
Yuxuan Xu , Peiyu Zhou , Qi Chen , Ziyi Liu , Xing Wang , Minwen Deng , Haibin Zhou , Yong Han , Pingping Yao
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引用次数: 0
Abstract
The quantitative Evolution of the braking properties and tribo-layer of copper based friction materials (CBFM) at 400 km/h equivalent energy density was investigated. The braking properties of CBFM were determined, with two significant degradations at the 1st and 12th cycles. The ratio of formation to damage of the tribo-layer, t, based on the thickness of the sub-surface of CBFM and wear debris, was defined. The variation of t showed an excellent correlation with the decline in the coefficient of friction. The mechanically mixed layer (MML) deteriorates after the first cycle, evolving into a mixed MML-PDL (plastic deformation layer) structure. The deformed substrate gradually loses hard particles, resulting in a tribo-layer predominantly composed of severely deformed copper, with minimal iron content and numerous defects.
期刊介绍：
Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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