摘要
以经典无限大叠层板理论和热弹性力学为基础，通过自行开发的计算机辅助设计系统对ＳｉＣ／Ｃ ＦＧＭ中的热应力分布进行了理论分析，得到制备ＳｉＣ／Ｃ的功能梯度材料最佳工艺参数．采用热压烧结工艺，在 １９５０℃， ２５ ＭＰａ和保温 １ｈ的条件下制备出了 Ｆ４和 Ｆ７两种无宏观缺陷的块体ＳｉＣ／Ｃ功能梯度材料．采用ＳＥＭ对ＦＧＭ微观结构进行了观察．５００℃室温淬水实验表明，按最佳参数制备的功能梯度材料Ｆ７具有良好的抗热震性能．
The thermal stress in SiC/C FGM in steady temperature field was analyzed based on the clas- sical lamination theory and thermo-elastic mechanics. The optimum composition distribution parameters for fabricating SiC/C FGM were obtained through the above analysis. SiC/C FGM F4 and F7 were fabricated suc- cessfully by hot pressing. The microstructure was observed by SEM. Thermal shock resistance of SiC/C FGM was repeatedly tested by quenching from 500 ℃ into water with room temperature. It has been proved that FGM F7, which was fabricated with the optimized parameters, has better thermal shock resistance.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2001年第1期32-34,共3页
Journal of University of Science and Technology Beijing
基金
国家高技术研究发展计划863资助项目!(NO.863-715-0230)
