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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

ZrO2(3Y)/Fe3Al复合材料的显微结构及性能

李嘉1,2; 尹衍升1; 谭训彦1   

  1. 1. 山东大学材料液态结构与遗传性教育部重点实验室工程陶瓷山东省重点实验室 济南 250061; 2. 济南大学材料学院, 济南 250022
  • 收稿日期:2002-11-18 修回日期:2003-01-16 出版日期:2004-01-20 网络出版日期:2004-01-20

Microstructure and Mechanical Properties of ZrO2(3Y)/Fe3Al Composites

LI Jia1,2; YIN Yan-Sheng1; TAN Xun-Yan1   

  1. 1. Key Lab for Liquid Structure and Heredity of Ministry of Education; Engineering Ceramics Key Lab; of Shandong Province; Shandong University; Jinan 250061; China; 2. Dept.of Material Science and; Engineering; Jinan University; Jinan 250022; China
  • Received:2002-11-18 Revised:2003-01-16 Published:2004-01-20 Online:2004-01-20

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摘要： 采用热压烧结制备了ZrO2(3Y)/Fe3Al复合材料,材料的室温抗弯强度、断裂韧性、HRA硬度分别为1321MPa、36MPa·m1/2、86.7,临界热震温差(ΔT)由单相ZrO2(3Y)的250℃提高至500℃.显微结构研究表明,裂纹桥联、裂纹偏转及相变增韧的协同作用,及位错对裂纹扩展的扰动作用是断裂韧性成倍增加的主要原因.

关键词: 氧化锆, 铁铝金属间化合物, 增韧, 抗热震性能

Abstract: ZrO2(3Y)/Fe3 Al composites were synthesized by HP sintering.The results show that their room flexural strength,fracture toughness and hardness(HRA)measured are 1321MPa, 36MPa·m1/2 and 86.7 respectively,and their critical temperature difierence(ΔT)of thermal shock elevates from 250℃ of ZrO2(3Y)to 500℃.The elevation of fracture toughness results from the compatible effect of crack bridge,crack deflection,stress-induced transformation toughening and the disturbing of dislocation on crack spread.

Key words: zirconia, iron aluminides intermetallic, toughening, thermal shock resistance

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