自蔓延高温合成/快速加压法制备二硼化钛陶瓷的致密化机理  

DENSIFICATION MECHANISM OF TiB_2 CERAMICS PREPARED BY THE SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS/QUICK PRESSING METHOD

作　　者：孟范成[1] 傅正义[1] 张金咏[1] 王为民[1] 王皓[1] 王玉成[1] 张清杰[1] 

机构地区：[1]武汉理工大学,材料复合新技术国家重点实验室,武汉430070

出　　处：《硅酸盐学报》2007年第4期430-434,共5页Journal of The Chinese Ceramic Society

基　　金：教育部重大培育和创新团队(704034;PCSIRT);教育部重点(104251);湖北省创新群体(2006ABC006)资助项目

摘　　要：用自蔓延高温合成/快速加压(self-propagating high temperature synthesis/quick pressing,SHS/QP)法制备了TiB2陶瓷。用扫描电镜及透射电镜观察陶瓷产品的微观形貌。对TiB2陶瓷致密化的动力学过程及结构形成过程进行了分析,并提出SHS/QP陶瓷烧结的致密化机理。结果表明:在SHS/QP过程中TiB2陶瓷的致密化是晶粒的重排及高温塑性变形共同作用的结果。Titanium diboride ceramics were prepared by the self-propagating high temperature synthesis/quick pressing （SHS/QP） method. The morphologies of the ceramics produced were characterized by scanning electron microscopy and transmission electron microscopy. The densification mechanism was discussed based on dynamic analysis of the densification process and experimental observations of the structure formation. The results indicate that both the re-arrangement and high-temperature plastic deformation of grains are operative during SHS/QP processing.

关 键 词：致密化机理 二硼化钛 自蔓延高温合成/快速加压法 

分 类 号：TQ174.75[化学工程—陶瓷工业] TF125.3[化学工程—硅酸盐工业]