Synthesis and pyrolysis of single-source precursor for HfCxN1-x-SiC ceramic with different SiC contents. Issue 16 (15th August 2022)

• Record Type: Journal Article
• Authors: Zeng, Guang; Xu, Ping; Zeng, Chen; Fang, Cunqian; Wang, Yafeng; Yang, Xin; Zhang, Mingyu; Su, Zhean; Huang, Qizhong
• Is Part Of: Ceramics international. Volume 48:Issue 16(2022)
• Page Start: 22967
• Page End: 22974
• Publication Date: 2022-08-15
• Subjects: Single-source precursor -- Pyrolysis -- Ultra-high-temperature ceramics -- HfC-SiC; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.04.263
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A novel single-source precursor was synthesized to prepare HfCx N1-x /SiC multiphase ceramics by using hafnium chloride (HfCl4 ), diallylamine (DAA) and polycarbosilane (PCS). We conducted an investigation of the synthesis process, polymer-to-ceramic conversion, as well as the microstructure and phase evolution of HfCx N1-x /SiC multiphase ceramics with different levels of SiC content. The results showed that the core-shell particles of HfCx N1-x -carbon were embedded homogeneously in the β-SiC matrix which is beneficial for preventing grain growth and improving oxidation resistance. Based on data from oxidation tests, the ceramics improved the oxidation temperature and remained stable at a high temperature (1500 °C) with oxidation layer formation on the surface. Due to the highly cross-linked structure without oxygen, high ceramic yield, homogeneous composition and excellent oxidation resistance of the pyrolysis product, the as-prepared precursor is a promising material for making high-performance composite ceramics.