Investigation on braking performance and wear mechanism of full-carbon/ceramic braking pairs. (February 2020)

• Record Type: Journal Article
• Authors: Ma, Xu; Fan, Shangwu; Sun, Haodong; Luan, Chenghua; Deng, Juanli; Zhang, Litong; Cheng, Laifei
• Is Part Of: Tribology international. Volume 142(2020)
• Publication Date: 2020-02
• Subjects: Full-carbon/ceramic pair -- Brake -- Friction coefficient -- Wear rate; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.105981
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: In this work, the braking performance of full-carbon/ceramic pairs that are suitable for high-speed trains and automobiles was examined. After braking, the morphologies of the friction surface were observed via SEM and the sub-surface of the brake pads were characterized by FIB and TEM. According to the results, introducing a ductile phase like FeSi2 into the brake pads was beneficial for decreasing the coefficient of friction (COF) to an acceptable range and effectively improved the wear resistance. When braking under high pressure, the friction surface of the FeSi2 modified C/C–SiC pads were maintained while that of the virgin C/C–SiC pads were totally destroyed, the wear resistance of the former was up to an order of magnitude higher than the latter. Highlights: Braking performance of full-carbon/ceramic pairs were examined on a lab-scale brake system. Introducing ductile phase into C/C–SiC pads was beneficial to decrease the COF to an appropriate range. Wear rate of the modified brake pads can be an order of magnitude lower than that of virgin C/C–SiC pads.