C/C复合材料热梯度CVI工艺致密化过程的非稳态温度场分析  

ANALYSIS OF UNSTABLE TEMPERATURE FIELD FOR THERMAL GRADIENT CVI DENSIFICATION PROCESS OF C/C COMPOSITE

作　　者：孙国岭[1] 李贺军[1] 齐乐华[2] 王兆伟[1] 胡志彪[1] 陈强[1] 

机构地区：[1]西北工业大学材料学院,西安710072 [2]西北工业大学机电学院,西安710072

出　　处：《金属学报》2006年第10期1046-1050,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目50072019;国家杰出青年基金项目50225210资助

摘　　要：针对C/C复合材料热梯度化学气相渗透工艺(TCVI)致密化过程温度场难以用解析法求解的问题,建立了TCVI过程非稳态温度场有限元模型,给出了该过程温度场变化的分布曲线,研究了温度场变化规律及致密化效率与沉积温度的关系,数值模拟结果与实验结果吻合较好,为提高TCVI工艺致密化效率提供了理论指导．During thermal gradient chemical vapor infiltration （TCVI） fabricating C/C composites, the complex change of the temperature field is difficult to solve by using analytics. A finite element model concerning unstable temperature field for TCVI process was proposed to overcome this problem, and the distribution curves of the temperature field change during the whole infiltration process were given out by numerical simulation. The relationship between deposition temperature and densification efficiency was also investigated. The simulated results of the temperature distribution accord with the experimental ones.

关 键 词：C/C复合材料 化学气相渗透 热梯度 数值模拟 非稳态温度场 

分 类 号：TB332[一般工业技术—材料科学与工程]