摘要
氧化反应引起裂纹愈合是结构陶瓷提高强度的一个重要途径．针对目前研究中缺乏定量性这一不足之处,本文从热力学和动力学角度研究了氧化反应与裂纹愈合、强度提高之间的定量关系．建立了裂纹愈合模型,并进行了动力学研究,分析了高温加热时间、温度、裂纹尺寸对裂纹愈合及材料强度的影响．以期为裂纹愈合与强度恢复的定量或半定量的研究,实现人为精确控制裂纹愈合的程度提供一定的理论依据．
Oxidation reaction induced crack healing is one kind of very important methods to improve the strength of engineering ceramics. The quantitative relation among crack healing, oxidation reaction, and strength improvement were researched. A crack healing model was established and the kinetic analysis of crack healing studied. The effects of time, temperature, and crack size on crack healing were also studied. The purpose of this paper is supplying theory foundation for quantitative study of crack healing and exact controlling of crack healing.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期187-192,共6页
Journal of Inorganic Materials
基金
合肥工业大学中青年科技创新群体基金(130037016)
关键词
裂纹愈合
动力学
愈合速度
强度
crack healing
kinetic
velocity of healing
strength
