Friction and wear properties of C/C–SiC braking composites
Friction and wear properties of C/C–SiC braking composites
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DOI：
10.1016/j.ceramint.2011.11.015
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发表时间：
2012-04
影响因子：
5.2
通讯作者：
Xuan Zhou;Dongmei Zhu;Q. Xie;F. Luo;Wan-cheng Zhou
中科院分区：
文献类型：
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作者：
Xuan Zhou;Dongmei Zhu;Q. Xie;F. Luo;Wan-cheng Zhou
以不同初始密度的多孔C/C复合材料为预制体，分别采用先驱体渗透热解（PIP）和化学气相渗透（CVI）法制备了两个系列的C/C-SiC复合材料。利用MM-1000型摩擦试验机研究了C/C-SiC制动复合材料的摩擦学特性。比较了两种复合材料的摩擦磨损性能，并对影响C/C-SiC复合材料摩擦磨损性能的因素进行了讨论。结果表明，摩擦磨损性能与SiC含量和孔隙率密切相关。随着预制体初始密度的增加，SiC含量和孔隙率降低，摩擦系数明显增加，制动时间和磨损率均降低。制备工艺对C/C-SiC复合材料的摩擦学性能有重要影响。与PIP工艺相比，CVI工艺试样的摩擦系数略高，制动时间短，磨损率高。
Two series of C/C–SiC composites were fabricated via precursor infiltration pyrolysis (PIP) and chemical vapor infiltration (CVI) using porous C/C composites with different original densities as preforms, respectively. The tribological characteristics of C/C–SiC braking composites were investigated by means of MM-1000 type of friction testing machine. The friction and wear behaviors of the two series of composites were compared and the factors that influence the friction and wear properties of C/C–SiC composites were discussed. Results show that the friction and wear properties relate close-knit to the content of SiC and porosity. As the original preform density increasing, the content of SiC and porosity decrease, and then the friction coefficient increases obviously, the braking time and the wear rate both decrease. Preparation techniques play an important role in the tribological properties of C/C–SiC composites. Compared with PIP process, the samples from CVI have a little higher friction coefficient, shorter braking time and higher wear rate.