【摘要】 研究了 mullite（w） 含量对 mullite（w）/TZP 复合材料显微结构和力学性能的影响。结果表明,当mullite（w）含量大于15 v.-%,热压温度超过1600℃时复合材料将开裂;原因是 Y₂O₃从 TZP 中脱溶进入玻璃相。mullite（W）含量在5-20 V.-%时,室温力学性能与基质 TZP 大致相同:σ_f=1200MPa,K_IC=12MPa2^1/m;而1000℃时复合材料抗弯强度为360-430MPa,是基质 TZP 的1.8-2.1倍。更多还原

【Abstract】 Effect of mullite whisker contents on the microstructure and mechanical proper-ties of mullite（w）/TZP ceramic composites were studied.The experimental results show thatwhen the mullite whisker contents are more than 15v.-% and hot-pressed temperature is higherthan 1600℃,the composites crack as a result of dissolution of Y₂O₃ from TZP into the glassyphase during the sintering.The mechanical properties of 5-20v.-% mullite（w）/TZP.compo-sites at room temperature areσ_f=1200MPa and K_IC=12Mpa 2^1/mwhich are closely same asTZP matrix;furthermore,the fracture strength of the composites at 1000℃ is about360-430MPa,1.8-2.1 times of TZP matrix.更多还原