Y-TZP陶瓷的低温烧结性能(英文)  

Sintering Ability of Y TZP Ceramics at Low Temperatures

作　　者：孟广耀[1] 王焕庭[1] 顾云峰[1] O.ToftSorensen 

机构地区：[1]中国科技大学材料科学与工程系 [2]Riso国家实验材料部

出　　处：《中国科学技术大学学报》1998年第4期421-426,共6页JUSTC

摘　　要：采用商品Ｙ２Ｏ３稳定的四方ＺｒＯ２粉体（ＹＴＺＰ）在低于１３００℃下得到完全致密的ＹＴＺＰ陶瓷．微结构发育过程的ＳＥＭ观察表明其致密化过程主要是由成颈生长和烧结初期形成的亚晶粒的并合过程组成．提出了三阶段烧结模型，并很好地解释了非等温烧结数据．力学性能测试表明低温（＜１３００℃）烧结样品具有与高温（１６００℃）烧结样品相当的弯折强度．Fully sintered Y TZP ceramics were obtained at below 1300℃from commercial yttria stabilized tetragonal zirconia (TZY) powders. The microstructure development observed by SEM showed that the densification process takes place by neck growth and by coalescence of the subgrains formed at an early sintering stage. A three stage model for the sintering process is proposed to illustrate non isothermal experimental data. The bending strength measurement demonstrated that the specimens sintered at lower temperature(<1300℃)had a bend strength comparable to that of materials sintered at a high temperature(1600℃).

关 键 词：Y-TZP陶瓷 陶瓷 烧结 

分 类 号：TQ174.7[化学工程—陶瓷工业]