Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第20卷    第7期    总第136期    2010年7月

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文章编号:1004-0609(2010)07-1316-05
温压−熔融渗硅法制备C/C-SiC摩擦材料及其摩擦磨损性能
韩团辉,肖 鹏,李 专

(中南大学 粉末冶金国家重点实验室,长沙 410083)

摘 要: 以短切炭纤维、石墨粉、硅粉、树脂为原料,采用新开发的温压−熔融渗硅(WC-RMI)法制备C/C-SiC摩擦材料,对不同制动速度下材料的摩擦磨损性能进行研究,并对温压−熔融渗硅法的制备工艺过程进行理论分析。结果表明:C/C-SiC材料的密度可达1.78 g/cm3,残留单质Si的含量为0.3%,摩擦因数为0.36~0.43,体积磨损量低至0.6×10−2 cm3/MJ,且随着制动速度的增大,其磨损量迅速下降并趋于平稳;C/C-SiC材料在摩擦过程中能够形成光亮、平整、连续的摩擦膜,有效降低C/C-SiC材料的磨损量。

 

关键词: C/C-SiC摩擦材料;温压;熔融渗硅;摩擦磨损

Preparation and tribological properties of C/C-SiC composites by
warm compacted-reactive melt infiltration process
HAN Tuan-hui, XIAO Peng, LI Zhuan

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:The C/C-SiC composites were prepared by a new method of warm compaction-reactive melt infiltration (WC-RMI) process with short carbon fibers, graphite powders, Si powders and resins as raw materials. The friction and wear behaviors of C/C-SiC composites at different braking speeds were investigated. And the studies on WC-RMI method in theory were carried out. The results show that the density of C/C-SiC composites is 1.78 g/cm3, residual Si content is 0.3%, the friction coefficients are 0.36−0.43 and the wear loss decreases to 0.6×10−2 cm3/MJ. And the wear loss declines sharply at first and then keeps stable as the speed increases. The bright and smooth friction film in the course of friction forms on the C/C-SiC composites, which can decrease the wear loss obviously.

 

Key words: C/C-SiC composites; warm compaction; reactive melt infiltration; friction and wear

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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