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多层界面相对SiCf/SiC复合材料综合性能的影响
  
DOI:
中文关键词:  SiCf/SiC  BN-SiC-BN多层界面相  力学性能  抗氧化性
英文关键词:SiCf/SiC  BN-SiC-BN multilayer interphase  mechanical properties  oxidation resistance
基金项目: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)
作者单位
康治伟1,李志伟1,彭雨晴1*,王梦千1 ,张方舟1, 李艳2 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陕西 710025 
通讯作者:康治伟1,李志伟1,彭雨晴1*,王梦千1 ,张方舟1, 李艳2  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,陕西 710025  
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中文摘要:
      界面相的存在对于SiCf/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SiCf/SiC复合材料,即:SiCf/BN/SiC;SiCf/(BN-SiC)/SiC和SiCf/(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,SiCf/(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。
英文摘要:
      The presence of interfacial phases has an important effect on the mechanical and oxidation resistance properties of SiCf/SiC composites. In this paper, SiCf/SiC composites with three different interfaces (SiCf/BN/SiC, SiCf/(BN-SiC)/SiC; SiCf/(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 SiCf/(BN-SiC-BN)/SiC composite have a maximum strength retention of about 95% in high-temperature aerobic environments about 1200 ℃ and exhibit better Self-healing ability.
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