High Preformation SiC-AlN Composites |
| |
摘 要: |
|
收稿时间: | 1997-07-28 |
High Preformation SiC-AlN Composites |
| |
Authors: | Zhongming CHEN Shouhong TAN Zhaoquan ZHANG and Dongliang JIANG |
| |
Affiliation: | Zhongming CHEN,Shouhong TAN,Zhaoquan ZHANG and Dongliang JIANG(Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,China) |
| |
Abstract: | High performance SiC-AlN composites were fabricated by hot-pressing with Y2O3 as additive via liquid phase sintering. The SiC-AlN composites containing 5 vol. pct AlN exhibit superior mechanical properties with flexural strength, fracture toughness and Vickers hardness of 1131 MPa,6.1 MPa·m1/2 and 28.6 GPa respectively Microstructure observations indicate that the grain size of the composites is obviously inhibited due to the formation of solid solution. TEM-EDS analysis demonstrates the existence of the solid solution. In addition, subgrain boundaries induced by dislocations in the matrix SiC grains, seem to divide a large grain into numerous nano-sized small grains, which significantly increase the mechanical properties of the composites |
| |
Keywords: | |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《材料科学技术学报》浏览原始摘要信息 |
|
点击此处可从《材料科学技术学报》下载全文 |
|