期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 143, 期 1, 页码 407-415出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.09.020
关键词
Carbides; Electron microscopy; Microstructure; Mechanical properties; Oxidation
资金
- US Air Force Research Laboratory [FA8655-12-1-3004]
A zirconium carbide ceramic was hot pressed to full density thanks to the addition of TaSi2, which enabled the densification to occur at 1970 K and improved the mechanical properties as compared to monolithic ZrC. The microstructure was analysed by combined X-ray diffraction, scanning and transmission electron microscopy to investigate the effective role of the sintering additive. In addition, high temperature oxidation was performed using the reactor REHPTS (Reacteur Hautes Pression et Temperature Solaire) from 1800 to 2200 K for 20 min and this composite demonstrated to resist towards the highly oxidative conditions better than other carbides, thanks to the chemical modification of the oxide formed upon Ta addition. However from 2000 K, the specimen resulted very damaged. (C) 2013 Elsevier B.V. All rights reserved.
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