Properties of Ceramics in the ZrB2/ZrC/SiC System Prepared by Reactive Processing
Properties of Ceramics in the ZrB2/ZrC/SiC System Prepared by Reactive Processing
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DOI：
10.1002/9780470294482.ch12
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
I. Talmy;J. Zaykoski;Mark Opeka
中科院分区：
文献类型：
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作者：
I. Talmy;J. Zaykoski;Mark Opeka
ZrB 2-ZrC-SiC系统中的陶瓷由Zr（或ZrC）、SiB 4和C的混合物使用原位置换反应制备。显微结构和氧化行为，其特征在于作为一个功能的相组成的陶瓷，这是通过改变反应混合物中的组分的比例。与纯ZrB 2和ZrC陶瓷相比，以ZrB 2为主要相的陶瓷具有高达1500°C的高抗氧化性。ZrB 2/ SiC摩尔比为2（25vol.%SiC），含有少量或不含ZrC的陶瓷，在1500°C时抗氧化性最好。提出了一个描述陶瓷氧化行为的模型。
Ceramics in the ZrB2‐ZrC‐SiC system were prepared from mixtures of Zr (or ZrC), SiB4, and C using in‐situ displacement reactions. Microstructure and oxidation behavior were characterized as a function of phase composition of the ceramics which was varied by changing the ratio of components in the reactant mixtures. The ceramics with ZrB2as a predominant phase had high oxidation resistance up to 1500°C compared to pure ZrB2and ZrC ceramics. The ceramics with ZrB2/ SiC molar ratio of 2 (25 vol. % SiC), containing little or no ZrC, was the most oxidation resistant up to 1500°C. A model describing oxidation behavior of the ceramics is proposed.