ZrB_2-YAG-Al_2O_3复相陶瓷高温氧化机理研究  

High temperature oxidation mechanism of ZrB_2-YAG-Al_2O_3 multi-phase ceramics

作　　者：宋杰光[1] 王芳[1] 徐明晗[1] 杜大明[1] 李世斌[1] 纪岗昌[1] 马永红[1] 陈林燕[1] 

机构地区：[1]九江学院材料工程系九江市绿色再制造重点实验室,江西九江332005

出　　处：《兵器材料科学与工程》2011年第5期29-32,共4页Ordnance Material Science and Engineering

基　　金：江西省教育厅青年科学基金项目(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：研究ZrB2-YAG-Al2O3复相陶瓷的高温氧化机理,以改善超高温陶瓷抗氧化。结果表明,ZrB2-YAG-Al2O3复相陶瓷的氧化质量增加随YAG-Al2O3含量增加而减小,并随Al2O3摩尔比值增大而减小。在1 300℃以下,该复相陶瓷氧化质量增加随氧化时间延长而增加,但是随着氧化时间的延长,氧化质量增加率逐渐降低。在1 300℃以上,改变YAG-Al2O3含量对氧化质量增加趋势影响不大,但改变Al2O3的摩尔比值,氧化质量增加趋势变化较为明显。The oxidation mechanism of ZrB2-YAG-Al2O3 multi-phase ceramics was studied to improve the performance of ultra-high-temperature ceramics.The results show the oxidation weight gain decreases with increasing the content of YAG-Al2O3 and the molar ratio of Al2O3.At temperature below 1 300 ℃,with prolonging the oxidation time,the oxidation weight gain increases while the oxidation weight gain ratio decreases.At temperature above 1300 ℃,the effect tendency of oxidation weight gain is not obvious with varying the content of YAG-Al2O3,however,the effect tendency of oxidation weight gain is significant with varying the molar ratio of Al2O3.

关 键 词：超高温陶瓷 硼化锆 复相陶瓷 氧化机理 

分 类 号：TG146.1[一般工业技术—材料科学与工程]