YAG含量对ZrB_2-YAG复相陶瓷的性能影响研究  

Influence of YAG content on the properties of YAG-ZrB_2 multi-phase ceramics

作　　者：宋杰光[1] 徐明晗[1] 王秀琴[2] 王芳[1] 杜大明[1] 富伟[1] 李世斌[1] 纪岗昌[1] 

机构地区：[1]九江学院机械与材料工程学院粉末冶金材料与工艺实验室,江西九江332005 [2]九江学院图书馆,江西九江332005

出　　处：《粉末冶金技术》2013年第5期334-339,348,共7页Powder Metallurgy Technology

基　　金：江西省自然科学基金资助项目(20114BAB216023);江西省教育厅科学技术研究基金资助项目(GJJ13720);江西省"十二五"重点学科(材料加工工程)建设项目

摘　　要：ZrB_2具有优异的高温性能,常被作为超高温陶瓷应用,但是它难以致密化。为了能够得到致密度高和高温性能好的ZrB_2陶瓷,笔者研究了YAG含量对ZrB_2陶瓷性能的影响。结果表明:致密度随着YAG含量(质量分数,下同)由10%增加到40%而增高;但是,YAG含量从30%增加到40%,陶瓷致密度提高趋势变缓。YAG含量从30%增加到40%,陶瓷断裂韧度增高变缓。随着YAG含量增加,陶瓷高温氧化增重量减少,陶瓷的表面氧化层厚度减薄。ZrB2 belongs to a class of ultra-high-temperature ceramics （UHTCs） with an extremely high melting point, but its densification is difficult. To make ZrB2 ceramics with high relative density and good high-temperature property, in this article, the effect of YAG content on the property of YAG-ZrB2 multiphase ceramics was investigated. The results show that relative density increases with increasing YAG content from 10wt% to 40wt%, but the rate of increasing density from 10wt% to 30wt% is higher than that of from 30wt% to 40wt%. When the content of YAG is higher than 30wt% , fracture toughness increases a little. The weight gain due to oxidation decreases with increasing YAG content, resulting in a thinner oxidation layer.

关 键 词：超高温陶瓷 ZRB2 钇铝石榴石 致密度 氧化性能 

分 类 号：TQ174.758[化学工程—陶瓷工业]