Combustion synthesis of ZrB2-SiC composite powders ignited in air |
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| Authors: | Wen-Wen Wu Guo-Jun Zhang Yan-Mei Kan |
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| Affiliation: | a State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Shanghai 200050, China
b Graduate School of the Chinese Academy of Sciences, Beijing 100000, China |
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| Abstract: | ZrB2-SiC composite powders have been synthesized by combustion synthesis in air, using a mixture of Zr, B4C and Si as raw materials. It was found that the air atmosphere has played an important role in the ignition process of the SHS reaction. Three other kinds of ZrB2-SiC-ZrC composite powders with different ZrC content were also synthesized, and the ignition time has been measured for better understanding the ignition mechanism. As a result, the composite powders with particle size smaller than 1 µm and oxygen content as low as 0.4 wt.% were obtained. |
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| Keywords: | Combustion synthesis Borides Aerospace materials Ceramics |
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