Fabrication of modified ultra high-temperature ceramic hybrid powders using in situ grown SiC nanowires |
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Affiliation: | 1. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing 211167, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an 710072, China |
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Abstract: | Ultra-high temperature ceramic (UHTC) hybrid powders modified using in situ grown SiC nanowires (SiCNWs) were successfully prepared via a simple catalytic method. The self-produce carbon and silicon source promoted the growth of SiCNWs during the pyrolysis process of ZrB2 polymer precursors coated ZrB2-SiC powders. The results showed that the growth of SiCNWs could be explained by a tip-growth model and vapor–liquid–solid (VLS) growth mechanism. The SiCNWs with diameter of 200 nm were single crystalline, and the content could be controlled by changing the catalyst content. |
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Keywords: | Ceramics SiC nanowires Microstructure |
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