摘要
本文利用TEM研究了新型复相陶瓷刀具材料Jx-2-Ⅰ的界面结构,结果表明,在Jx-2-Ⅰ中Al_2O_3/SiCw(氧化铝/碳化硅晶须)界面和Al_2O_3/SiCp(碳化硅颗粒)界面结合良好,形成了具有较高强度的微观结构;发现在SiCw、SiCp和Al_2O_3晶粒上均有位错产生,在SiCp和Al_2O_3上有孪晶产生;分析表明,位错和孪晶的产生均吸收大量的断裂能,提高材料的断裂韧性,改善JX-2-Ⅰ材料的整体性能。
The interfacial microstructure of advanced composite ceramic tool material JX-2-Ⅰhas been studied withTEM, It shows that the tool material JX-2-Ⅰ has good interfacial bonding status of Al_O_3/SiCw orAl_2O_3/SiCp. The microstructure characterised by high strength are formed in JX-2-Ⅰ,It is found that there area lot of dislocations and twins generated in JX-2-Ⅰ. The process of dislocation or twin generation dissipatesmuch fracture energy and increases the fracture toughness of tool material.The mechanical properties of JX-2-Ⅰare improved also.
出处
《电子显微学报》
CAS
CSCD
1995年第5期365-368,共4页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金
关键词
复相陶瓷刀具
界面
位错
孪晶
复合材料
advanced composite ceramic tool interface dislocation twin