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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

氧化铝基陶瓷复合材料的微观结构与增韧机理

周洋; 詹国栋+; 徐明英++; 张以增++   

  1. 北京航空材料研究院先进复合材料国防科技重点实验室; 北京100095; +中国科学院上海硅酸盐研究所; 上海200050; ++华中理大学材料系; 武汉430074
  • 收稿日期:1996-03-14 修回日期:1996-05-03 出版日期:1997-04-20 网络出版日期:1997-04-20

Microstructures and Toughening Mechanisms of Alumina-Matrix Composites

ZHOU Yang; ZHAN Guodong+; XU Mingying++ ZHANG Yizeng++   

  1. National Key Laboratory of Advanced Composities; Beijing Institute of Aeronautical MaterialeBeijing 100095 China; +Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; ++Department of Materials, Huazhong University of Science and Technology Wuhan 430074 China
  • Received:1996-03-14 Revised:1996-05-03 Published:1997-04-20 Online:1997-04-20

PDF (PC)

1504

被引次数

94

摘要： 应用相交增韧、相变－晶须复合及相变－颗粒复合等方式对氧化铝陶瓷进行增韧．遇过各材料强韧性的测试、微观结构的分析以及断口形貌的对比，研究了各材料的断裂特点及不同增韧方式的增韧机理与效果，得出材料的强韧性与其断口形貌密切相关；双重增韧材料中，两种增韧方式不是简单的叠加，而是存在相互作用；同时在性能试验后的材料基体内观察到位借的存在．

关键词: 陶瓷基复合材料, 增韧机理, 微观结构, 强韧性

Abstract: Various toughening methods, such as transformation toughening, transformation-whiskerreinforcement and transformation-particle reinforcement were used toimprove the mechanical properties of alumina.The fracture behaviors and toughening mechanisms of the composites werc studied by measuringmechanical properties, analyzing microstructures and comparing fracture morphologies. The mechanical propertiesof testing materials arc closely related with the morphologies of fracturc surfaces. The two tougheningmcchanisms in joint toughening composites will affect with each other, and produce an effect of cooperative toughening on certain conditions. The dislocations were observed in matrix of meterials undergoing property test. The tearing ridges, which are created generally in ductile fracture, were also observed on fracture surface in ZTA material.

Key words: ceramic composite, toughening mechanism, microstructure, mechanical property