期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 27, 期 4, 页码 711-717出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2008.12.001
关键词
Ceramics; Oxidation; Microstructure
资金
- National Natural Science Foundation of China [90505015, 50602010]
- Research Fund for the Doctoral Program of Higher Education [20060213031]
- Program for New Century Excellent Talents in University
Two hafnium diboride based composites, respectively, containing 20 vol%SiC and 20 vol%SiC-10 vol%AlN, were hot-pressed. Microstructures and mechanical properties were investigated and the thermal stability over 2000 degrees C was evaluated by oxyacetylene torch. Results indicated that the addition of AlN greatly improved the powder sinterability by eliminating the oxygen contamination. The mechanical properties for HfB2-SiC-AlN composite, especially the flexural strength were enhanced remarkably through the improvement in density and the formation of AlN-SiC solid solution. Oxyacetylene ablation results indicated that the addition of AlN also improved the thermal stability of composite under severe oxidation conditions. The ablation behavior was investigated and the ablation mechanism was discussed. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据