多层界面相对SiC_(f)/SiC复合材料综合性能的影响  

Effect of Multilayer Interphase on the Comprehensive Performance of SiC_(f)/SiC Composites

作　　者：康治伟 李志伟 彭雨晴 王梦千 张方舟 李艳[2] KANG Zhi-Wei;LI Zhi-Wei;PENG Yu-Qing;WANG Meng-Qian;ZHANG Fang-Zhou;LI Yan(Institute of Materials,Shanghai University,Shanghai 200072,China;Xi'an Aerospace Composites Research Institute,Xi'an 710025,China)

机构地区：[1]上海大学材料研究所,上海200072 [2]西安航天复合材料研究所,西安710025

出　　处：《现代技术陶瓷》2022年第4期282-293,共12页Advanced Ceramics

基　　金：上海市自然科学基金(20ZR1419600);上海市轻质结构复合材料重点实验室开放课题基金(2232019A4-05);国家自然基金(51803116)。

摘　　要：界面相的存在对于SiC_(f)/SiC复合材料的力学性能和抗氧化性能有重要影响,选择合适的界面相对于复合材料本身性能至关重要。本工作采用化学气相渗透工艺制备了具有三种不同界面的SiC_(f)/SiC复合材料,即:SiC/BN/SiC;SiC/(BN-SiC)/SiC和SiC/(BN-SiC-BN)/SiC,研究了多层界面相对材料本身力学性能和抗氧化性能影响。结果表明,界面相的存在有利于维持并提高材料本身的力学性能和抗氧化性能,并且在三种复合材料中,SiC/(BN-SiC-BN)/SiC复合材料在1200℃高温有氧环境强度保有率最高约为95%,并且呈现出更好的自愈合能力。The presence of interfacial phases has an important effect on the mechanical and oxidation resistance properties of SiC_(f)/SiC composites.In this paper,SiC_(f)/SiC composites with three different interfaces(SiC/BN/SiC,SiC/(BN-SiC)/SiC;SiC/(BN-SiC-BN)/SiC) were prepared by CVI(technology of chemical vapor infiltration) and the effect of multilayer interfaces about BN on the mechanical and oxidation resistance properties of the material itself was investigated.The results show that the presence of the interfacial phase is beneficial to maintain the mechanical and oxidation resistance properties of the material itself,and among the three composites,the SiC/(BNSiC-BN)/SiC composite have a maximum strength retention of about 95% in high-temperature aerobic environments about 1200℃ and exhibit better Self-healing ability.

关 键 词：SiC_(f)/SiC BN-SiC-BN多层界面相 力学性能 抗氧化性 

分 类 号：TB332[一般工业技术—材料科学与工程]