Oxidation-resistant ZrB2-SiC composites at 2200 °C

被引：295

作者：

Han, Jiecai ^{[1
]}

Hu, Ping ^{[1
]}

Zhang, Xinghong ^{[1
]}

Meng, Songhe ^{[1
]}

Han, Wenbo ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Peoples R China

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2008年 / 68卷 / 3-4期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

ultra-high-temperature ceramic (UHTC); ZrB2; SiC; oxidation resistance;

D O I：

10.1016/j.compscitech.2007.08.017

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Oxidation resistance tests were carried out on hot-pressed Zi-B-2-20 vol%SiC using an oxyacetylene torch. The temperature of the oxidized specimens exceeded 2200 degrees C. The mass and linear oxidation rates of the ZrB2-20 vol%SiC composites for 10 min were -0.23 mg/s and 0.66 mu m/s, respectively. The surface layer appeared dense and adherent with the exception of a few burst bubbles and craterlets. No macro-cracks or spallation were detected after oxidation, suggesting that these composites possess a super oxidation resistance. The microstructure of the surface and cross-section of the oxidized specimens were studied by scanning electron microscopy along with energy dispersive spectrometry and X-ray diffraction. The oxidation mechanism was also discussed. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：799 / 806

页数：8

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