CVI-RMI联用法制备高性能C/(C-SiC)陶瓷基刹车材料
Preparation of High-Performance C/(C-SiC)Ceramic Based Brake Materials by CVI-RMI Combined Method
范丽君1
作者信息
- 1. 烟台鲁航炭材料科技有限公司,山东烟台 264000
- 折叠
摘要
采用化学气相渗透-反应熔体渗透(CVI-RMI)联用法制备C/(C-SiC)陶瓷基复合材料,并对材料的微观结构和力学性能、热学性能、摩擦磨损性能进行研究.结果表明:CVI化学气相渗透最佳C/C多孔坯体密度为1.40～1.55 g/cm3,RMI熔融渗硅最佳温度为1 650℃,制备的C/(C-SiC)复合材料密度2.10 g/cm3.本方法制备的C/(C-SiC)复合材料力学性能优于采用前驱体浸渍裂解(PIP)法制备的复合材料,且导热性能优异,满足高温环境使用要求.研究发现C/(C-SiC)复合材料的摩擦系数适中,力矩曲线平稳,湿态下摩擦性能无衰减,静摩擦系数高满足低速刹车要求,且磨损量小.
Abstract
C/(C-SiC)ceramic matrix composites were prepared by the combined method of chemical vapor infiltration reactive melt infiltration(CVI-RMI),and the microstructure,mechanical properties,thermal properties,and friction and wear properties of the materials were studied.the results show that the optimal C/C porous body density for CVI chemical vapor infiltration is 1.40-1.55 g/cm3,the optimal temperature for RMI melt infiltration is 1 650℃,and the density of C/(C-SiC)composite materials prepared is 2.10 g/cm3.the mechanical properties of C/(C-SiC)composite materials prepared by this method are superior to those prepared by precursor impregnation cracking(PIP)method,and the thermal conductivity is excellent,meeting the requirements of high-temperature environmental use.research has found that the friction coefficient of C/(C-SiC)composite material is moderate,the torque curve is stable,the friction performance does not decay in wet state,the static friction coefficient is high,and it meets the requirements of low-speed braking,and the wear amount is small.
关键词
CVI化学气相沉积/RMI反应熔体渗透/C/(C-SiC)陶瓷基刹车材料Key words
CVI chemical vapor deposition/RMI reaction melt penetration/C/(C-SiC)ceramic based brake material引用本文复制引用
出版年
2024
NETL
NSTL
万方数据