AlN和AlN/BN层状复合陶瓷的高温氧化行为  

Oxidation Behavior of AlN and AlN/BN Laminated Composites Ceramics at High Temperatures

作　　者：张涛[1] 金海云[2] 赵继峰[1] 金志浩[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2009年第11期2008-2011,共4页Rare Metal Materials and Engineering

基　　金：陕西省自然科学基金(SJ08-ZT04)

摘　　要：采用循环氧化法对单相AlN和层状AlN/h-BN复合陶瓷在1000及1300℃空气中的氧化动力学曲线进行研究。结果指出,在1000℃时,层状AlN/h-BN复合陶瓷的氧化增量低于单相AlN陶瓷;在1300℃时,其氧化动力学曲线分为缓慢增重、快速氧化增重和抛物线增重3个阶段,由XRD分析及扫描电镜观察发现,在1300℃氧化30h后,试样已不存在BN相,并且由于界面层BN的氧化挥发而残留有微孔。The oxidation kinetics curves of both AIN and AIN/BN laminated composite ceramics at 1000 and 1300℃ were studied using a cycle-oxidation method. The result shows that the weight increase of AIN/h-BN laminated ceramic composites is lower than AIN ceramic at 1000℃, and the oxidation dynamics curve of AIN/BN laminated composite ceramics could be divided into three courses at 1300℃： a slowly weight increase, a rapid weight increase and a parabola shape weight increase. The XRD analysis and SEM observations show that there was no BN inside the AIN/BN laminated composite ceramics after 1300℃ oxidation and the micropores remain due to the vaporizing of B2O3 oxidized by BN.

关 键 词：AlN/BN 层状复合陶瓷 性能 高温氧化 

分 类 号：TQ174.1[化学工程—陶瓷工业]