Journal of Inorganic Materials

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Effect of Sintering Temperature on Microstructure and Properties of Cf/SiC Composites

DING Yu-Sheng, DONG Shao-Ming, GAO Le, HE Ping, ZHANG Xiang-Yu, JIANG Dong-Liang   

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2007-09-27 Revised:2008-05-13 Published:2008-11-20 Online:2008-11-20

Abstract: Cf/SiC composites reinforced by carbon fiber were fabricated by hot-pressing. The effects of sintering temperature on the densities, microstructure and mechanical properties were studied. Densities of the Cf/SiC composites are increased with the increase of sintering temperature, and the bending strength and fracture toughness are increased with the sintering temperature increasing from 1800℃ to 1850℃, The highest bending strength and fracture toughness of the composites fabricated at 1850℃ are 500.1MPa and 16.9MPa·m 1/2, respectively. However, when the temperature increases to 1880℃, the mechanic properties of the composite decreases.

Key words: Cf/SiC composites, hot-pressing, liquid phase

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