CVI+RMI快速制备C/C-SiC复合材料的摩擦学性能  

Tribological Properties of C/C-SiC Composites Prepared Rapidly by CVI+RMI

作　　者：范永中 杨闯 陈贺 FAN Yong-zhong;YANG Chuang;CHEN He(Hong De New Material Technology(Huludao)Co.,Ltd.,Huludao 125000,China)

机构地区：[1]宏德新材料科技(葫芦岛)股份有限公司,辽宁葫芦岛125000

出　　处：《材料保护》2023年第1期98-103,共6页Materials Protection

摘　　要：为了研究C/C坯体热处理温度对C/C-SiC复合材料微观结构和摩擦性能的影响,以针刺碳毡为预制体,经化学气相渗透法(CVI)制备C/C坯体,然后采用反应熔体浸渗法(RMI)制备C/C-SiC复合材料。结果表明:C/C坯体高温热处理未改变C/C-SiC复合材料的相组成。C/C坯体热处理温度对C/C-SiC复合材料的摩擦磨损性能产生一定的影响。与1 800℃相比,C/C坯体经2 000℃和2 200℃热处理后,C/C-SiC复合材料的摩擦面更易形成致密的润滑膜,摩擦系数逐渐增大;且随着制动次数的增加,摩擦系数变化幅度变小,刹车稳定。In order to study the effects of C/C green body heat treatment temperature on the microstructure and friction properties of C/C-SiC composites, the C/C green body was prepared by chemical vapor infiltration(CVI) with needled carbon felt as preform, and then the C/C-SiC composites were prepared by reactive melt infiltration(RMI). Results showed that the high temperature heat treatment of C/C green body did not change the phase composition of C/C-SiC composites. The heat treatment temperature of C/C green body had certain influences on the friction and wear properties of C/C-SiC composites. Compared with a heat treatment at 1 800 ℃, the friction surface of C/C-SiC composites was easier to form a dense lubricating film after a heat treatment at 2 000 ℃ and 2 200 ℃, and the friction coefficient increased gradually. Besides, with the increase of braking times, the change of friction coefficient declined and the braking was stable.

关 键 词：C/C坯体 C/C-SIC复合材料 化学气相渗透法 反应熔体浸透法 热处理 摩擦学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]