| TiC添加量对细晶Al2O3-TiC复合陶瓷热震疲劳抗力的影响 |
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| 引用本文： | 斯庭智,刘宁,张庆安,尤显卿. TiC添加量对细晶Al2O3-TiC复合陶瓷热震疲劳抗力的影响[J]. 矿冶工程, 2006, 26(1): 81-84 |
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| 作者姓名： | 斯庭智 刘宁 张庆安 尤显卿 |
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| 作者单位： | 安徽工业大学,材料科学与工程学院,安徽,马鞍山,243002;合肥工业大学,材料科学与工程学院,安徽,合肥,230009 |
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| 基金项目： | 安徽省教育厅青年教师资助项目（2005JQ1072） |
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| 摘 要： | 热压制备了Al2O3—TiC复合陶瓷。研究了Al2O3—TiC复合陶瓷的热震疲劳机制和TiC的添加量对其热震疲劳抗力的影响。热震过程中的微裂纹,裂纹桥接和偏转,热震裂纹表面的“碎粒”及粗糙性等的共同作用是Al2O3-TiC复合陶瓷热震疲劳产生的主要机制。具有一定微孔洞的材料,热震循环时微裂纹易于孔洞处产生,有益于热震疲劳抗力的提高。A30材料韧性最高且孔隙率最大,从而其热震循环疲劳抗力得到改善。
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| 关 键 词： | 热震疲劳机制 热震疲劳抗力 裂纹桥接和偏转 微裂纹 |
| 文章编号： | 0253-6099(2006)01-0081-04 |
| 收稿时间： | 2005-09-18 |
| 修稿时间： | 2005-09-18 |
Effects of TiC Content on Thermal Shock Resistance of Fine Grained Al2O3-TiC Composite Ceramics |
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| SI Ting-zhi,LIU Ning,ZHANG Qing-an,YOU Xian-qing. Effects of TiC Content on Thermal Shock Resistance of Fine Grained Al2O3-TiC Composite Ceramics[J]. Mining and Metallurgical Engineering, 2006, 26(1): 81-84 |
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| Authors: | SI Ting-zhi LIU Ning ZHANG Qing-an YOU Xian-qing |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, Anhui, China ; 2. Department of Materials Science and Engineering, Hefei University of Technology, Hefei , 230009, Anhui , China |
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| Abstract: | Hot-pressed Al_2O_3-TiC composite cerams were fabricated.The thermal shock fatigue mechanisms of the ceram were discussed.The effects of TiC content on the thermal shock fatigue resistance were studied.The main cause of thermal shock fatigue is the co-action of micro-cracks,crack bridge and deflection,"crushed particles" and roughness on the crack surface during thermal shock cycling. For the material with certain micro-holes,micro-cracks will occur at the holes during thermal shock cycling,being good for improving the thermal shock fatigue resistance.The toughness and porosity of A30 are the best,so that the thermal shock fatigue resistance of the material is improved. |
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| Keywords: | thermal shock fatigue mechanism thermal shock fatigue resistance crack bridge and deflection micro-crack |
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