反应熔融渗透法制备SiC陶瓷及其抗冲击性能研究

doi:10.3969/j.issn.1001-1935.2026.02.001

耐火材料 ›› 2026, Vol. 60 ›› Issue (2): 93-97.DOI: 10.3969/j.issn.1001-1935.2026.02.001

• 研究开发 • 下一篇

反应熔融渗透法制备SiC陶瓷及其抗冲击性能研究

孙孟勇, 曲俊峰, 李国斌, 王雯龙, 孙淑丽, 冯莹

中国兵器工业集团第五二研究所山东烟台 264003

收稿日期:2025-04-29 出版日期:2026-04-15 发布日期:2026-04-15
作者简介:孙孟勇:男,1990年生,博士,副研究员。E-mail:sunmy@mail.nwpu.edu.cn

Preparation of SiC ceramic by reactive melt infiltration and their impact resistance

Sun Mengyong, Qu Junfeng, Li Guobin, Wang Wenlong, Sun Shuli, Feng Ying

First author’s address:52^nd Research Institute,China North Industries Group Corporation Limited,Yantai 264003,Shandong,China

Received:2025-04-29 Online:2026-04-15 Published:2026-04-15

摘要/Abstract

摘要： 为了揭示SiC陶瓷的动态损伤机制,以SiC粉、B₄C粉、炭粉为原料,以Si粉为熔渗剂,采用反应熔融渗透法制备了SiC陶瓷,主要研究了材料的物相组成、显微形貌和抗冲击性能,并对其动态行为进行了分析。结果表明:制备的SiC陶瓷残余硅含量为14.3%~15%(φ),物相包括SiC、B₁₂(C,Si,B)₃及Si,材料的弯曲强度为340 MPa,断裂韧性为4.6 MPa·m^1/2,维氏硬度达20.5 GPa;陶瓷表现出显著的单峰应变率强化效应,真应力最大值为1 950 MPa时,裂纹沿冲击加载方向优先扩展,损伤累积至临界点后材料发生雪崩式粉碎。

关键词: 碳化硅陶瓷, 反应熔融渗透法, 抗冲击性能, 动态损伤

Abstract: To reveal the dynamic damage mechanism of SiC ceramics,a SiC ceramic was fabricated via reactive melt infiltration using SiC powder,B₄C powder and carbon powder as starting materials,and Si powder as the infiltrant.The phase composition,microstructure and impact resistance of the as-prepared ceramic were mainly investigated,and the dynamic mechanical behavior was analyzed.The results show that the SiC ceramic contains SiC,B₁₂(C,Si,B)₃ and Si;and the residual silicon content is 14.3%-15% by volume.The ceramic exhibits flexural strength of 340 MPa,fracture toughness of 4.6 MPa·m^1/2,and Vickers hardness of 20.5 GPa.The ceramic presents an obvious single-peak strain rate strengthening effect;when the true stress reaches 1 950 MPa,cracks propagate preferentially along the impact loading direction,and the material undergoes avalanche crushing after damage accumulates to a critical point.

Key words: silicon carbide ceramics, reactive melt infiltration, impact resistance, dynamic damage

中图分类号:

TQ174

孙孟勇, 曲俊峰, 李国斌, 王雯龙, 孙淑丽, 冯莹. 反应熔融渗透法制备SiC陶瓷及其抗冲击性能研究[J]. 耐火材料, 2026, 60(2): 93-97.

Sun Mengyong, Qu Junfeng, Li Guobin, Wang Wenlong, Sun Shuli, Feng Ying. Preparation of SiC ceramic by reactive melt infiltration and their impact resistance[J]. Refractories, 2026, 60(2): 93-97.

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反应熔融渗透法制备SiC陶瓷及其抗冲击性能研究

Preparation of SiC ceramic by reactive melt infiltration and their impact resistance

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