Preparation and tribological properties of C/C–SiC brake composites modified by in situ grown carbon nanofibers
Preparation and tribological properties of C/C–SiC brake composites modified by in situ grown carbon nanofibers
复制标题
原位生长碳纳米纤维改性C/C-SiC制动复合材料的制备及摩擦学性能
DOI：
10.1016/j.ceramint.2015.05.139
复制
发表时间：
2015-11
影响因子：
5.2
通讯作者：
Lu Yuhai
中科院分区：
文献类型：
--
作者：
Xiao Peng;Zhang Bengu;Li Yang;Lu Yuhai
目前的结果和经验表明，目前用于碳基或传统系统的刹车片限制了C/C - sic复合材料的广泛使用。本文采用原位生长碳纳米纤维（CNFs）在碳纤维表面改性C/C - SiC制动复合材料，采用化学气相渗透法制备热解碳（PyC）基体，采用液态硅渗透法制备SiC陶瓷基体。研究了CNFs对C/C - sic复合材料摩擦副摩擦学性能的影响及其与金属配对摩擦副的机理。结果表明，该材料的密度和开孔率分别为2.18 g/cm3和6.3%。由于CNFs的生长，PyC与碳纤维之间形成了更好的键合界面，使得C/C - sic复合材料具有优异的摩擦学性能。与未经CNFs改性的C/C - sic复合材料相比，本研究的C/C - sic复合材料具有更高的静摩擦系数（0.38）和动摩擦系数（0.29）。结果表明，复合材料制动稳定，摩擦亚表面温度较低（396℃），CNFs改性的C/C - sic和CNFs改性的C/C - sic的线性磨损率分别为2.23 μm cycle - 1和1.24 μm cycle - 1，具有较好的耐磨性。CNFs改性C/C - sic摩擦副与金属摩擦副配合的制动过程可分为三个阶段，主要磨损机制为晶粒磨损、疲劳磨损、黏着磨损和氧化磨损。
Present results and experience show that currently used brake pads for carbon-based or conventional systems limits the broader use of C/C–SiC composites. In this work, the C/C–SiC brake composites were modified by in situ grown carbon nanofibers (CNFs) on carbon fibers surface, pyrolytic carbon (PyC) matrix was fabricated by chemical vapor infiltration, and SiC ceramic matrix was fabricated by liquid silicon infiltration. The effects of CNFs on the tribological properties and mechanisms of the friction pairs of C/C–SiC composites mating with metallic counterpart were investigated. The results indicated that the density and open porosity of the materials were 2.18 g/cm3and 6.3%, respectively. Due to the growth of CNFs, a better bonding interface formed between PyC and carbon fibers, and leaded to excellent tribological characteristics of C/C–SiC composites. Compared to the C/C–SiC composites without CNFs modification, the C/C–SiC composites in this work showed higher static friction coefficient (0.38) and dynamic friction coefficient (0.29). As a result the composites braked steadily, with lower temperature on friction subsurface (396 °C), and the linear wear rates of C/C–SiC with CNFs modification and counterpart were 2.23 μm cycle−1and 1.24 μm cycle−1, respectively, which were superior in wear resistance. The brake process of the friction pairs of C/C–SiC with CNFs modification mating with metallic counterpart could be divided into three stages, and the main wear mechanisms consisted of grain abrasion, fatigue wear, adhesive wear and oxidation abrasion.
登录
查看更多内容
影响因子：
9.1
作者：
Shangwu Fan;Litong Zhang;Lai-fei Cheng;G. Tian;Shangjie Yang
通讯作者：
Shangwu Fan;Litong Zhang;Lai-fei Cheng;G. Tian;Shangjie Yang
影响因子：
2.6
作者：
W. Krenkel
通讯作者：
W. Krenkel
影响因子：
10.9
作者：
Yequn Liu;LianLong He;Xue-feng Lu;P. Xiao
通讯作者：
Yequn Liu;LianLong He;Xue-feng Lu;P. Xiao
影响因子：
10.9
作者：
Xiong, X;Huang, BY;Xu, HJ
通讯作者：
Xu, HJ
影响因子：
5.2
作者：
Xuan Zhou;Dongmei Zhu;Q. Xie;F. Luo;Wan-cheng Zhou
通讯作者：
Xuan Zhou;Dongmei Zhu;Q. Xie;F. Luo;Wan-cheng Zhou