Fabrication and Properties of 3D-Cf/Mullite Composites with SiC Interfacial Coatings

Ke Wei Dai; Chen Chen Zhang; Qing Song Ma; Hai Tao Liu

doi:10.4028/www.scientific.net/AMR.833.150

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 833Fabrication and Properties of 3D-Cf/Mullite...

Fabrication and Properties of 3D-C_f/Mullite Composites with SiC Interfacial Coatings

Abstract:

Three-dimensional carbon fiber reinforced mullite composites (3D-C_f/mullite) were fabricated by sol-gel method with diphasic mullite sol as raw materials. SiC interfacial coatings were deposited by polycarbosilane infiltration and pyrolysis before sol-gel process. The as-fabricated composites showed 285.7MPa in flexural strength, relatively close to 277.6MPa of those without coatings. After treated at 1300°C and 1500°C in Ar atmosphere for 1h, the retention rates of flexural strength were 80.0% and 69.9%, respectively, which showed a great improvement compared to the composites without coatings. This was attributed to the prevention of carbothermal reduction between carbon fiber and matrix by SiC coatings.

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Periodical:

Advanced Materials Research (Volume 833)

Pages:

150-153

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.833.150

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Online since:

November 2013

Authors:

Ke Wei Dai, Chen Chen Zhang, Qing Song Ma, Hai Tao Liu

Keywords:

Carbon Fiber (CF), Mechanical Property, Mullite, SiC Coating, Sol-Gel Preparation

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