TiC起始粉末粒径对TiC/Al2O3复合陶瓷热震行为的影响

硅酸盐通报 , 2006, 25(5): 79-205. doi: 10.3969/j.issn.1001-1625.2006.05.018

TiC起始粉末粒径对TiC/Al2O3复合陶瓷热震行为的影响

斯庭智 ^1, , 张庆安 ^2, , 刘宁 ^3, , 尤显卿 ^4,

1.安徽工业大学材料科学与工程学院,马鞍山,243002

2.安徽工业大学材料科学与工程学院,马鞍山,243002

3.合肥工业大学材料科学与工程学院,合肥,230009

4.合肥工业大学材料科学与工程学院,合肥,230009

基金项目: 安徽省高校青年教师科研项目(2005JQ1072)

关键词：热震疲劳机制 , 热震疲劳抗力 , 裂纹桥接和偏转 , 微裂纹

Effect of TiC Starting Powder Size on Thermal Shock Behaviors of TiC/Al2O3 Ceramics

通过使用不同粒径TiC起始粉末热压制备了AT1和AT2两种不同晶粒大小的TiC/Al2O3复合陶瓷.研究了TiC/Al2O3复合陶瓷的热震循环疲劳机制和TiC起始粉末粒径对热震循环疲劳抗力的影响.TiC起始粉末粒径的调整可以控制TiC/Al2O3复合陶瓷的晶粒大小.AT2材料晶粒细化,其力学性能的改善是其热震循环疲劳抗力改善的根本原因.热震循环过程中的微裂纹,裂纹桥接和偏转,热震裂纹间的"碎粒"等是引起TiC/Al2O3复合陶瓷热震疲劳的机制.热震循环疲劳机制和细晶强化的综合作用导致了AT2材料的热震抗力有较大改善.

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材料期刊网

TiC起始粉末粒径对TiC/Al2O3复合陶瓷热震行为的影响

Effect of TiC Starting Powder Size on Thermal Shock Behaviors of TiC/Al2O3 Ceramics

参考文献