Microstructure and mechanical and thermal properties of ternary carbides in Hf-Al-C system
文献类型：期刊论文
| 作者 | L. F. He ; Y. W. Bao ; J. Y. Wang ; M. S. Li ; Y. C. Zhou |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:9页码:2765-2774 |
| 关键词 | Carbides TEM High temperature Mechanical property Thermal property high-temperature elastic properties crystal-structure thermoelectric properties internal-friction silicon carbides grain-boundary bulk zr2al3c4 ceramics oxidation |
| ISSN号 | 1359-6454 |
| 中文摘要 | A Hf-Al-C composite composed of Hf(3)Al(3)C(5), Hf(2)Al(4)C(5) and Hf(3)Al(4)C(6) has been successfully synthesized by a hot pressing method; its microstructure and mechanical and thermal properties were systematically characterized. Hf-Al-C composite conserves the high hardness and stiffness similar to HfC. Interestingly, the composite exhibits Much higher strength and fracture toughness than HfC due to its fine and anisotropic grains. Diffusion-accommodated grain-boundary sliding of Hf-Al-C ceramics at high temperature is inhibited by glass-free grain boundaries and tight interlocking of grains at grain-edge triple junctions, resulting in high remaining stiffness up to 1600 degrees C. Dislocations on the basal planes of Hf-Al-C ceramics with a Burgers vector of 1/3 < 11 (2) over bar0 > can be activated at high temperature. Hf-Al-C composite shows higher coefficient of thermal expansion and specific heat capacity as well as lower thermal conductivity than HfC. The superior mechanical and thermal properties make Hf-Al-C compounds good high-temperature structural materials. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31959]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. F. He,Y. W. Bao,J. Y. Wang,et al. Microstructure and mechanical and thermal properties of ternary carbides in Hf-Al-C system[J]. Acta Materialia,2009,57(9):2765-2774. |
| APA | L. F. He,Y. W. Bao,J. Y. Wang,M. S. Li,&Y. C. Zhou.(2009).Microstructure and mechanical and thermal properties of ternary carbides in Hf-Al-C system.Acta Materialia,57(9),2765-2774. |
| MLA | L. F. He,et al."Microstructure and mechanical and thermal properties of ternary carbides in Hf-Al-C system".Acta Materialia 57.9(2009):2765-2774. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。