摘要
本文考察了２～３ｍｏｌ％Ｙ２Ｏ３稳定氧化锆（Ｙ－ＴＺＰ）材料在１００℃沸水及１２０～２００℃水热条件下性能下降规律．讨论了Ｙ－ＴＺＰ材料性能下降机理：ＯＨ－以扩散形式进入氧化锆晶格并占据其中的氧空位，Ｙ３＋与ＯＨ－作用，使四方相稳定存在的条件改变，从而导致四方相ＺｒＯ２（ｔ）→单斜相ＺｒＯ２（ｍ）相变，材料力学性能下降．同时从热力学分析出发，并结合实验研究，提出减缓性能下降的有效措施．
The degradation behaviour of 2-3mol% yttria stabilized zircoliia(Y-TZP) in 100℃ boiling water and 120-200℃ hot Water was investigated. The degradation process was understood as OH-ion diffused into zirconia crystal lattice, occupied oxygen vacancy and reacted with Y3+ to form Y(OH)2+, which resulted in the tetragonal(t) to monoclinic(m) phase transformation and decreased the mechanical properties of materials. The effective methods to control degradation of Y-TZP were discussed.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期286-290,共5页
Journal of Inorganic Materials
基金
国家自然科学基金
