Synthesis of ZrB₂-SiC nanocomposite powder via polymeric precursor route

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• 作者：Jiabei He^a ; Yan Gao^b ; ^{gaoyan@swjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yiguang Wang^a ; Jiyu Fang^c ; Linan An^c
• 关键词：Zirconium/zirconium compounds ; Ultra-high temperature ceramics ; Polymer precursor ; Composites
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1602-1607
• 全文大小：1242 K

文摘

Zirconium diboride/silicon carbide (ZrB₂-SiC) nanocomposite powder, wherein each and every particle is a nanocomposite, was successfully synthesized by pyrolyzing a hybrid polymeric precursor produced from a Zr-containing precursor and a solid polycarbosilane precursor. The synthesis and ceramic conversion of the hybrid precursor was studied by thermal gravimetric analysis-differential scanning calorimetry, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. The microstructure of the obtained nanocomposite powder was observed by scanning electron microscopy. The resulting powder was found to consist of uniformly distributed highly spherical ZrB₂ nanoparticles embedded within the SiC matrix, which demonstrated the success of the proposed synthesis route. Thus, in this study, a different perspective was used in synthesizing ZrB₂-SiC nanocomposites, which act as potential candidates for aerospace applications.