氧化因素对ZrB_2-YAG复相陶瓷表面微区影响的研究  

Effect of oxidizing factor on the surface microdomain of ZrB_2-YAG multi-phase ceramics

作　　者：宋杰光[1] 纪岗昌[2] 李世斌[1] 李养良[1] 王芳[2] 李伟[1] 陈林燕[1] 张联盟[3] 

机构地区：[1]九江学院机械与材料工程学院,江西九江332005 [2]九江学院九江市绿色再制造重点实验室,江西九江332005 [3]武汉理工大学材料复合新技术国家重点试验室,湖北武汉430070

出　　处：《电子显微学报》2011年第1期12-17,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家973计划项目(5133102);江西省教育厅青年科学基金资助项目(GJJ09595);江西省教育科学"十一五"规划课题(09YB449);九江学院大学生自主创新性实验项目(09XSCXXSY13)

摘　　要：二硼化锆具有许多优异性能,因此它的应用非常广泛。本文研究氧化因素对ZrB2-YAG复相陶瓷的表面微区的影响,为改善超高温陶瓷奠定基础。结果表明:随着氧化温度升高,氧化层厚度增加。在1 300℃以下温度,氧化后陶瓷表面都有(m)ZrO2、YAG、B2O3和ZrB2,而1 300℃氧化后陶瓷表层中的ZrB2完全被氧化,不存在了。氧化层厚度随氧化时间的延长而增厚,但增厚的速率越来越小。Zirconium diboride is widely used due to some excellent performances.Effect of oxidizing temperature on the surface microdomain of ZrB2-YAG multi-phase ceramics was studied,which aims to improve the performance of ultra-high-temperature ceramics.The results show that the oxidation layer thickness increases with the increasing of oxidation temperature.The ceramic surface shows the（m）ZrO2,YAG,B2 O3 and ZrB2 phases under the the oxidation temperature of 1 300 ℃,but the ceramic surface does not show the ZrB2 phase above the oxidation temperature of 1 300 ℃.That is to say that the ZrB2 phase of ceramic suface is entirely oxidized.The oxidation layer thickness increases with the increasing of the oxidation time.However,the increasing ratio of thickness is becomes smaller.

关 键 词：超高温陶瓷 二硼化锆 氧化因素 表面微区 复相陶瓷 

分 类 号：TQ174.1[化学工程—陶瓷工业]