期刊
ADVANCES IN APPLIED CERAMICS
卷 119, 期 4, 页码 218-223出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17436753.2020.1755510
关键词
Hafnium diboride; Silicon carbide; composite; oxidation; flexural strength
The oxidation and its effect on room temperature flexural strength were examined in hot-pressed 3 vol.-% La2O3-doped HfB2-20 vol.-% SiC composite exposed to air at 1400 degrees C and 1500 degrees C, respectively, for up to 100 h. The major oxidation products consisted of SiO2 (alpha-cristobalite), La2Si2O7, HfO2 and HfSiO4 regardless of oxidation temperature. However, the morphology of the microstructure of the oxidised surfaces was shown to be dependent on oxidation temperature. In addition, it was found that the room temperature flexural strength of the composite degraded after oxidation and the degradation of strength depended on oxidation time at temperature and oxidation temperature. The strength retention displayed by composite after 100 h of oxidation at 1400 degrees C and 1500 degrees C was similar to 83% and similar to 74%, respectively.
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