Research progress on preparation of silicon nitride-bonded silicon carbide materials by casting

doi:10.3969/j.issn.1001-1935.2026.04.015

Abstract

Abstract: Silicon nitride-bonded silicon carbide composites have become a research hotspot for new-generation advanced materials due to their excellent comprehensive properties.Among various forming processes,casting has become one of the key manufacturing technologies,which enables the fabrication of workpieces with complex shapes and large-sized products.However,this process is prone to defects including voids formed by particle packing,bubbles entrapped during mechanical mixing,and gas evolution from hydration of silicon powder.These defects raise the apparent porosity and lower the bulk density and mechanical strength.Moreover,excessive gas yielded from hydration reactions may even lead to cracking of green bodies in the drying process.In this work, the research progress of casting technology applied to silicon nitride-bonded silicon carbide materials was reviewed,and the improvement strategies aimed at solving the aforementioned problems were focused on.

Key words: silicon nitride-bonded silicon carbide, composites, particle packing, casting, silicon powder hydration

摘要： 氮化硅结合碳化硅复合材料,因其优良的综合性能已成为新一代先进材料的研究热点,在众多成型工艺中,浇注成型凭借其能够实现复杂形状工件和大尺寸产品的成型和生产,已经成为关键制造工艺之一。然而,该工艺存在颗粒堆积产生空隙、机械搅拌引入气泡以及硅粉水化产生气体等问题导致材料的显气孔率升高,体积密度和力学强度下降,甚至由于水化反应产生大量气体导致坯体在烘干过程中开裂。本文综述了氮化硅结合碳化硅材料浇注成型的研究进展,重点探讨了针对上述问题的改进策略。

关键词: 氮化硅结合碳化硅, 复合材料, 颗粒堆积, 浇注成型, 硅粉水化

CLC Number:

TQ175

Li Jiaxing, Li Yanjun, Yang Mingfang, Liu Donghua, Chen Jin, Ding Donghai, Xiao Guoqing. Research progress on preparation of silicon nitride-bonded silicon carbide materials by casting[J]. Refractories, 2026, 60(4): 357-362.

李佳星, 李延军, 杨明方, 刘冬华, 陈晋, 丁冬海, 肖国庆. 浇注成型制备氮化硅结合碳化硅材料的研究进展[J]. 耐火材料, 2026, 60(4): 357-362.

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URL: http://www.nhcl.cn/EN/10.3969/j.issn.1001-1935.2026.04.015

http://www.nhcl.cn/EN/Y2026/V60/I4/357

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