陶瓷晶界应力设计

Stress Design of Ceramic Grain Boundary

陶瓷材料的脆性一直是研究者们为之困扰的问题．在改进陶瓷材料的脆性上，经过近２０年的努力，在多相复合陶瓷的强化与增初以及氧化锆的相变增韧等方面均取得了显著的效果，但是仍然未能在本质上解决陶瓷材料的脆性问题．本文提出对陶瓷材料的晶界应力进行设计，通过在陶瓷体内的应力作用来造成一个可以转移、消耗和吸收外来能量的机制，以达到在本质上解决陶瓷材料的脆性问题．

Ceramic researchers are often in a puzzle about the brittleness problem of ceramic materials, and have exerted more efforts to solve this problem these last twenty years. Although researchs on strengthening and toughenting of multiphase composed ceramics and ZrO2 phase transformation toughening have made great progress, the brittleness of ceramic materials has not been essentially solved.The author proposes that stress states in grain boundaries of ceramic materials can be designed;through stress interaction, a mechanism of transfering, consuming or absorbing applied energy can be formed, so that the brittleness problem can be basically solved.