Tribological performance of B4C modified C/C-SiC brake materials under dry air and wet conditions
Tribological performance of B4C modified C/C-SiC brake materials under dry air and wet conditions
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B4C改性C/C-SiC制动材料在干空气和潮湿条件下的摩擦学性能
DOI：
10.1016/j.ceramint.2019.03.210
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发表时间：
2019
影响因子：
5.2
通讯作者：
Laifei Cheng
中科院分区：
文献类型：
--
作者：
Shangwu Fan;Xu Ma;Yifan Ning;Chenghua Luan;Liuyang He;Juanli Deng;Litong Zhang;Laifei Cheng
本文选用B4 C作为添加剂，改善C/C-SiC刹车材料的摩擦学性能。B_4C改性C/C-SiC（C/C-B_4C-SiC）刹车材料中含有C、B_4C、Si和SiC四种物相。其磨损率远低于C/C-SiC，特别是在高制动速度。B4 C颗粒的引入可以降低制动温度。在制动过程中，材料中的B4 C可被氧化成B2 O3。B2 O3的流动可以覆盖炭纤维与热解炭的界面，防止炭纤维与热解炭的氧化，从而降低刹车材料的氧化磨损。在潮湿条件下，C/C-B4 C-SiC刹车材料的刹车性能没有下降，刹车过程稳定。
In this work, boron carbide (B4C) was selected as additive to improve the tribological performance of C/C-SiC brake materials. It contained four phases (C, B4C, Si and SiC) in B4C modified C/C-SiC (C/C-B4C-SiC) brake materials. Its wear rates were much less than that of C/C-SiC, especially at high braking speeds. The introduction of B4C particles could reduce the braking temperature. During the braking process, B4C in the material can be oxidized to B2O3. The flow of B2O3could cover the interface of carbon fiber and PyC to prevent them from oxidation and thereby reduce the oxidative wear of the brake materials. Under wet conditions, the braking property of C/C-B4C-SiC brake materials did not degrade, whereas the braking process was found to be stable.