航空材料学报2011，Vol.31Issue(2)：67-71,5.DOI:10.3969/j.issn.1005-5053.2011.2.013
钇铝石榴石对氧化铝基陶瓷型芯高温性能的影响
Effect of Yttrium Aluminum Garnet on High-Temperature Properties of Alumina-Based Ceramic Cores
摘要
Abstract
A new strengthening process was developed to improve the high-temperature properties of alumina-based ceramic cores by vacuum pressure impregnation (VPI) with yttrium sol as reinforcing agent. The experimental results showed that the high-temperature properties of the cores were improved significantly as impregnating times increasing. After three times impregnation strengthening, the deformation at 1550℃/0.5h decreased from 7.38 mm to 0. 72 mm and the flexural strength at 1550℃ increased from 0.95MPa to 4.61 MPa. Meanwhile the apparent porosity still kept above 40％ to guarantee the core leach property. X-ray diffraction revealed that the content of YAG( yttrium aluminum garnet, a high-temperature strengthening phase)was increased through VPI, which was obviously observed by SEM.关键词
氧化铝基型芯/钇铝石榴石/高温性能Key words
alumina-based ceramic core/ yttrium aluminum garnet/ high-temperature properties分类
矿业与冶金引用本文复制引用
徐东阳,李涤尘,吴海华,邢建东,孙博..钇铝石榴石对氧化铝基陶瓷型芯高温性能的影响[J].航空材料学报,2011,31(2):67-71,5.基金项目
国家重点基础研究发展计划(2007CB707704):中国博士后科学基金(20100471618) （2007CB707704）
