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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

原位Al2O3pl/Ce-TZP复合材料的显微结构与力学性能

叶建东; 李红彦; 王迎军   

  1. 华南理工大学无机材料系, 广州 510641
  • 收稿日期:2000-06-22 修回日期:2000-08-22 出版日期:2001-07-20 网络出版日期:2001-07-20

Microstructure and Mechanical Properties of in Situ Al2O3pl/Ce-TZP Composites

YE Jian-Dong; LI Hong-Yan; WANG Ying-Jun   

  1. Dept. of Inorganic Materials; South China University of Tech. Guangzhou 510641 China
  • Received:2000-06-22 Revised:2000-08-22 Published:2001-07-20 Online:2001-07-20

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摘要： 研究了原位生长Ａｌ２Ｏ３片晶／Ｃｅ－ＴＺＰ复合材料的显微结构与力学性能．结果表明，只要烧结温度适当，引入原位Ａｌ２Ｏ３片晶可同时提高复合材料的强度和断裂韧性．在所研究的范围内，以含 １５ ｖｏｌ％Ａｌ２Ｏ３的复合材料有最好的强韧化效果，而增韧效果又比增强效果明显．如果烧结温度过低或者Ａｌ２Ｏ３含量过高，则复合材料的力学性能反而下降．原位Ａｌ２Ｏ３片晶／Ｃｅ－ＴＺＰ复合材料的强韧化机理为应力诱导相交增韧和片晶增韧，两者起到协同增韧的作用．

关键词: 氧化锆, 氧化铝, 片晶, 原位增韧

Abstract: The microstructure and mechanical properties of in situ Al2O3 platelet/Ce-TZP composites were studied. The results indicate that both the strength and fracture
toughness of the composites can be increased by introduction of in situ Al2O3 platelets if sintered at a suitable temperature. The reinforcement is most effective
for the specimens containing 15 vol% Al2O3 while the toughening effects are better than the strengthening. The mechanical properties of the composites decrease
if the sintering temperature is too low or the Al2O3 content is too high. The toughening mechanisms in the composites include transformation toughening
and platelet reinforcement. They are enhanced by their co-operation.

Key words: zirconia, alumina, platelet, in situ reinforcement

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