摘要
本文以ＺｒＯＣｌ２８Ｈ２Ｏ、Ａｌ２Ｏ３及Ｙ（ＮＯ３）３为原料，用共沉淀法合成Ｙ２Ｏ３含量不同的ＺｒＯ２－Ａｌ２Ｏ３复合粉体，并采用热压工艺制备复相陶瓷．研究了氧化钇含量对复相陶瓷力学性能及应力诱导下氧化锆相变能力的影响．结果表明，氧化钇含量为１．８ｍｏｌ％时，复相陶瓷中氧化锆仍能全部保持为四方相，且在应力诱导下可相交量高达６４．６％，使材料呈现优良的室温和较好的高温力学性能．
Zro2-Al2O3 powders were prepared by co-precipitation using zirconium oxychloride, aluminum chloride and yttrium nitrate as starting materials. Al2O3/Y-TZP composite was fabricated by hot-pressing.The effects of content of yttria stabilizer on the mechanical properties and the ability of transformation of t-ZrO2 were investigated. The results illustrated: tetragonal-ZrO2 was fUlly retained in the composite containing yttria stabilizer as low as 1.8 mol%. For 25vol% Al2O3/1.8Y-TZP composite, fraction of transformable tetragonal-ZrO2 was high to 64.6%, resulting in the great improvenent of the mechanical properties in the range of room temperature to 1000℃.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期259-263,共5页
Journal of Inorganic Materials
基金
国家八六三计划资助
关键词
复相陶瓷
相变增韧
氧化钇
氧化锆陶瓷
Y-TZP, Y_2O_3content,multiphase ceramic,transformation toughening
