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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

Fe3Al(p)/Al2O3陶瓷基复合材料的抗热震性能

李嘉1,2; 尹衍升2; 龚红宇2; 师瑞霞2; 周春华2   

  1. 1. 济南大学材料学院, 济南 250022; 2. 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
  • 收稿日期:2004-02-16 修回日期:2004-03-09 出版日期:2005-03-20 网络出版日期:2005-03-20

Thermal Shock Resistance of Fe3Al(p)/Al2O3 Composite

LI Jia1,2; YIN Yan-Sheng2; GONG Hong-Yu2; SHI Rui-Xia2; ZHOU Chun-Hua2   

  1. 1. Department of Material Science and Engineering; Jinan University; Jinan 250022; China;2. Key Lab for Liquid Structure and Heredity of Ministry of Education; Engineering Ceramics Key Lab of Shandong Province; Shandong University; Jinan 250061; China
  • Received:2004-02-16 Revised:2004-03-09 Published:2005-03-20 Online:2005-03-20

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摘要： 采用热压烧结制备了Fe3Al(p)／Al2O3复合材料,通过分析R曲线与热应力强度因 子K曲线的相关性,对Fe3Al(p)／Al2O3复合材料抗热震性能进行分析预测.结果表明,理论 预测与采用淬冷强度法得到的实验结果吻合较好,Fe3Al的加入使复合材料的抗热震性能明 显改善, △Tc由单相的200℃提高至复合材料的400℃,复合材料较单相Al2O3高的断裂韧 性、导热率、及低的弹性模量和f(β)是导致其抗热震性能提高的主要原因.

关键词: 抗热震性能, 复合材料, R曲线

Abstract: Fe3Al(p)l/Al2O3 composites were prepared by hot-press sintering. The thermal shock resistance of the composite was predicted by analyzing the relation between the R-curve and thermal stress intensity factor curve. The results show that the predicting values consist well with the experimentally measured values obtained by the quench- strength method. The thermal shock resistance of the composite is improved by adding Fe3Al particles, the △Tc increasing from 200℃(Al203) to 400℃(composite). The higher fracture toughness, higher thermal conductivity and lower Young's module and f(β) are the main reasons for the improvement of thermal shock resistance.

Key words: thermal shock resistance, composite, R-curve

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