Preparation and oxidation behaviour of SiC-based ceramics with TaB2 addition
Preparation and oxidation behaviour of SiC-based ceramics with TaB2 addition
复制标题
DOI：
10.1016/j.ceramint.2019.08.057
复制
发表时间：
2019-12
影响因子：
5.2
通讯作者：
Li-xiang Wu;Wei‐Ming Guo;Shikuan Sun;Lin-lin Zhu;Ling-Yong Zeng;Hua-Tay Lin;P. Xiao
中科院分区：
文献类型：
--
作者：
Li-xiang Wu;Wei‐Ming Guo;Shikuan Sun;Lin-lin Zhu;Ling-Yong Zeng;Hua-Tay Lin;P. Xiao
Liquid-phase-sintered SiC ceramics (LPS-SiC) with the sintering additives of Y2O3–Al2O3and Y2O3–Al2O3–TaB2were prepared. The oxidation behaviours of these sintered SiC ceramics were studied after oxidation test at 1300 °C in air. In comparison with SiC ceramicwith Y2O3–Al2O3, the addition of TaB2inhibited the formation of the secondary phase of Y3Al5O12(YAG) and homogeneous distribution of Al element in the SiC matrix was evidenced. After oxidation at 1300 °C, SiC ceramic without TaB2additive was found to possess a two-layer structure within the oxidation region. In contrast, SiC ceramic with TaB2additive demonstrated the three-layer structure consisting of a dense intermediate layer of SiO2, which could protect the SiC matrix from further oxidation.
