Oxidation Behavior of Hot Pressed ZrB2‐ZrC‐SiC Ceramic Composites |
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| Authors: | Yue Zhang Dong Gao Chunlai Xu Yang Song Xiaobin Shi |
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| Affiliation: | 1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, , Beijing, 100191 People's Republic of China;2. AVIC Commercial Aircraft Engine CO., LTD, , Shanghai, 200241 People's Republic of China;3. National Key Laboratory of Advanced Functional Composite Materials Technology, , Beijing, 100076 People's Republic of China |
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| Abstract: | Dense ZrB2‐SiC ceramics containing 40 vol% ZrC particles are fabricated via hot pressing method. Then the sintered ceramics are oxidized in air up to 1500°C, and the oxidation kinetics of the ceramic composites is deduced in combination with the reacted fraction curves. As indicated by the experimental results, the oxidation kinetics changes from reaction‐controlled process to diffusion‐controlled one with increasing of oxidation temperature. In addition, the oxidation kinetics parameters are obtained, which indicates that the oxidation resistance decays at elevated temperatures. Furthermore, the evolution of surface morphology and oxide scale during oxidation process is clarified. |
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