High temperature oxidation behavior of ZrB2-SiC added MoSi2 ceramics |
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| Authors: | Zongwei Tong Rujie He Tianbao Cheng Keqiang Zhang Dawei Dai Yazheng Yang Daining Fang |
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| Affiliation: | 1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, PR China;2. Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China;3. Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, PR China;4. People''s Liberation Army Institute of Neurosurgery, Shanghai Institute of Neurosurgery, Department of Neurosurgery, Changzheng Hospital, Second Military Medical University, Shanghai 200003, PR China |
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| Abstract: | In this paper, MoSi2, MoSi2-20?vol% (ZrB2-20?vol% SiC) and MoSi2-40?vol% (ZrB2-20?vol% SiC) ceramics were prepared using pressureless sintering. The oxidation behaviors of these MoSi2-(ZrB2-SiC) ceramics were investigated at 1600?°C for different soaking time of 60, 180 and 300?min, respectively. The oxidation behaviors of the MoSi2-(ZrB2-SiC) ceramics were studied through weight change test, oxide layer thickness measurement, and microstructure analysis. Further investigation of the oxidation behaviors of the MoSi2-(ZrB2-SiC) ceramics was conducted at a higher temperature of 1800?°C for 10?min. The microstructure evolution of the ceramics was also analyzed. It was finally found that the oxidation resistance of MoSi2 was improved by adding ZrB2-SiC additives, and the MoSi2-20?vol% (ZrB2-20?vol% SiC) ceramic exhibited the optimal oxidation resistance behavior at elevated temperatures. From this study, it is believe that it can give some fundamental understanding and promote the engineering application of MoSi2-based ceramics at high temperatures. |
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| Keywords: | Oxidation Microstructure |
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