C/SiC-SiO2复合材料的制备及性能研究
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航天材料及工艺研究所,北京 100076

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TB332

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基础加强重大项目(90070380030101032101)


The Research on Preparation and Properties of C/SiC-SiO2 Composites
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Aerospace Research Institute of Materials & Processing Technology,Beijing 100076

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    摘要:

    采用溶胶凝胶和前驱体浸渍裂解混合工艺,制得了不同SiO2/SiC比例的C/SiC-SiO2复合材料,研究了SiO2添加量对复合材料微观结构、力学性能的影响。结果表明:当添加SiO2的质量分数约25%时,材料的拉伸强度和压缩强度与C/SiC材料性能相当;而当添加SiO2的质量分数超过25%时,材料的强度与模量均随SiO2含量的增加呈降低趋势。此外,SiO2含量约25%的C/SiC-SiO2复合材料的浸渍相成本较C/SiC材料降低约24%左右,这为C/SiC复合材料的快速低成本制备提供了新的技术支撑。

    Abstract:

    The C/SiC-SiO2 composites with different SiO2/SiC ratios were prepared by sol-gel-PIP process. The effect of SiO2 content on the microstructure and mechanical properties of the composites was investigated. The results show that the tensile and compressive strength of C/SiC-SiO2 composites with the mass fraction of SiO2 no more than 25% are close to those of C/SiC composites. When the mass fraction of SiO2 added exceeds 25%, the strength and modulus of composites decrease with increasing of SiO2 content. It is worthy to mention that the fabrication cost of C/SiC-SiO2 composite with 25% SiO2 content is 24% lower than that of C/SiC composite, which provides a new technical approach for the rapid and low-cost preparation of C/SiC composites.

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王兆可,龚晓冬,孙新,张国兵,李军平. C/SiC-SiO2复合材料的制备及性能研究[J].宇航材料工艺,2022,52(1):65-70.

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历史
  • 收稿日期:2021-09-25
  • 最后修改日期:2021-12-15
  • 录用日期:2021-12-07
  • 在线发布日期: 2022-02-25
  • 出版日期: 2022-02-28
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