COMPOSITES SCIENCE AND ENGINEERING ›› 2014, Vol. 0 ›› Issue (8): 27-30.

• BASIC STUDY • Previous Articles     Next Articles

STUDY ON THE FLEXURAL STRENGTH OF SiO2/SiO2 CERAMIC COMPOSITES

ZHOU Shao-jian1,2, LIAN Yun-qing1,2*, YANG Jie, XIAO Chun1,2   

  1. 1. Xi'an Aerospace Composites Research Institute, Xi'an 710025 ,China;
    2. National and Local Union Engineering Research Center of High performance Carbon Fiber Manufacture and Application, Xi'an 710089, China
  • Received:2014-03-18 Online:2014-08-28 Published:2021-09-13

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Abstract: 2.5D SiO2/SiO2composites were fabricated by sol-gel method using silica fiber and silica sol as the starting materials. The mechanical performance of the SiO2/SiO2 composites and the effect under different service temperature,passivation technics are studied. And the properties of SiO2/SiO2 composites and the effective factors are also studied. The results show that the composite achieves the best mechanical properties when the heat treatment temperature is 650℃. After the passivation technics,the flexural strength were increased by 17%. The results indicate that the SiO2/SiO2 composites had well heat-resistant. An inflexion point for high temperature bending property of SiO2/SiO2 composites is between 600~800℃,which is related to the self-union of molten condition SiO2. Whereas after 800℃, the bending property of SiO2/SiO2 composites decreased.

Key words: SiO2/SiO2 ceramic composites, heating temperature, bending property

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