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.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
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
关键词
超高温陶瓷
ZRB2
钇铝石榴石
致密度
氧化性能
ultra-high-temperature ceramics
ZrB2
YAG
relative density
oxidation property
