| 气压烧结Al2O3/TiCN复合材料的力学性能与显微结构 |
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| 引用本文： | 杨海涛,尚福亮,高玲.气压烧结Al2O3/TiCN复合材料的力学性能与显微结构[J].功能材料,2006,37(11):1784-1786. |
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| 作者姓名： | 杨海涛 尚福亮 高玲 |
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| 作者单位： | 1. 深圳大学,深圳特种功能材料实验室,理学院材料系,广东,深圳,518060
2. 武汉理工大学,材料复合新技术国家重点实验室,湖北,武汉,430070 |
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| 基金项目： | 教育部科学技术研究重点项目
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国家自然科学基金 |
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| 摘 要： | 运用二步气压烧结工艺成功制备了Al2O3-30%(质量分数)TiCN复合材料.材料的相对密度达到99.5%,抗折强度为772MPa,硬度为19.6GPa,断裂韧性高达5.82MPa/m2.该材料的烧结过程为固相烧结,烧结过程中TiCN颗粒几乎没有长大,而Al2O3颗粒则长大为原来3倍左右.材料在冷却过程中由于Al2O3和TiCN的热力学性能的失配而引起的界面微应力增长到50MPa左右,不会在材料中导致晶界开裂,但却足以使晶粒发生位错,从而使材料的性能得以增强.
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| 关 键 词： | Al2O3 气压烧结 力学性能 显微结构 |
| 文章编号： | 1001-9731(2006)11-1784-03 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006-08-21 |
Mechanical properties and microstructure of Al2O3/TiCN composite by gas pressure sintering |
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| YANG Hai-tao,SHANG Fu-liang,GAO Ling.Mechanical properties and microstructure of Al2O3/TiCN composite by gas pressure sintering[J].Journal of Functional Materials,2006,37(11):1784-1786. |
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| Authors: | YANG Hai-tao SHANG Fu-liang GAO Ling |
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| Affiliation: | 1. Shenzhen Key Lab. of Special Functional Materials,Department of Materials, School of Science, Shenzhen University, Shenzhen 518060, China; 2. State Key Lab. of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | Al2O3 - 30wt%TiCN composites have been fabricated successfully by two-stage gas pressure sintering schedule. The gas pressure sintered Al2O3 - 30wt%TiCN composite achieved a relative density of 99.5%, a bending strength of 772MPa, a hardness of 19.6GPa, and a fracture toughness of 5.82MPa/m^2. It is a solid state sintering of two phases without solubility for Al2O3 -TiCN composite. Little grain growth occurred for TiCN during sintering while Al2O3 grains grew about 3 times. The interface microstress arising during cooling from the processing temperature because of the thermal and/or mechanical properties mismatch between the Al2O3 and TiCN phase is about 50MPa. Such a compressive microstress is not high enough to cause grain boundary cracking that may weaken the composite but to introduce dislocations within grains, which is very good to enhance the composites. |
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| Keywords: | Al2O3 gas pressure sintering mechanical properties microstrueture |
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