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19卷    第7期    总第124期    2009年7月

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文章编号:1004-0609(2009)07-1257-07
B、Si改性炭/炭复合材料及其摩擦磨损特性
涂欣达,易茂中,葛毅成,彭  可,冉丽萍,雷宝灵,杨  琳

(中南大学 粉末冶金国家重点实验室,长沙 410083)

摘 要: 以低密度的C/C复合坯体为预制体,分别采用反应熔渗(RMI)、化学气相沉积(CVD)、浸渍−原位反应技术对其进行陶瓷改性。结果表明:改性陶瓷分别以SiC和c-BN的形式渗入C/C复合坯体内。摩擦试验结果表明:采用RMI技术制备的C/C-SiC复合材料摩擦因数较高,高达0.3到0.9;采用CVD技术制备的C/C-SiC复合材料的摩擦因数在0.20~0.36之间;而采用浸渍−原位反应技术制备的c-BN改性C/C复合材料的摩擦因数较低,为0.10~0.20。SEM观察表明:采用RMI技术制备的C/C复合材料的摩擦表面粗糙、未形成完整的摩擦膜,而采用另两种技术制备的C/C复合材料均形成了较完整、致密的摩擦膜。

 

关键字: C/C复合坯体;碳化硅;氮化硼;摩擦磨损

C/C composites modified by B, Si and their friction and
 wear properties
TU Xin-da, YI Mao-zhong, GE Yi-cheng, PENG Ke, RAN Li-ping, LEI Bao-ling, YANG Ling

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

Abstract:The low density C/C composites were modified by B and Si using reaction melt infiltration (RMI), chemical vapour deposition (CVD) and impregnation and in-situ reaction. The results show that the modified ceramics are successfully added in the matrix carbon as SiC or c-BN. The C/C-SiC modified by RMI has high friction coefficient which reaches 0.30−0.90. The friction coefficient of C/C-SiC modified by CVD changes in 0.20−0.36, while the composites modified by c-BN using impregnation and in-situ reaction hold the lowest friction coefficient, which is 0.10−0.20. The wear surfaces of the RMI-modified composites are very rough without any integrated friction film, while the wear surfaces of the other two composites are compacted and integrated.

 

Key words: C/C composites; SiC; boron nitride; 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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