Microstructure and Mechanical Property of Three-Dimensional Needled C/SiC Composites Prepared by Precursor Pyrolysis

Cui Lin Han; Dong Lin Zhao; Lei Zhang; Zeng Min Shen

doi:10.4028/www.scientific.net/KEM.434-435.45

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Microstructure and Mechanical Property of...

Microstructure and Mechanical Property of Three-Dimensional Needled C/SiC Composites Prepared by Precursor Pyrolysis

Abstract:

Three-dimensional needled carbon/silicon carbide (C/SiC) composites with pyrolytic carbon interfacial layer were fabricated by precursor pyrolysis. The microstructure and mechanical property of the three-dimensional needled C/SiC composites were investigated. A thin pyrolysis carbon layer (0.2m) was firstly deposited on the surface of carbon fiber as the interfacial layer with C3H6 at 850 °C and 0.1 MPa by chemical vapor infiltration. Polycarbosilane and divinylbenzene were selected as a precursor to silicon carbide ceramics and a cross-linking reagent for PCS, respectively. The density of the composites was 1.94 g cm-3. The flexural strength of the three-dimensional needled C/SiC composites was 135 MPa. The three-dimensional needled C/SiC composites with pyrolytic carbon interfacial layer exhibit good mechanical properties and a typical failure behavior involving fibers pull-out and brittle fracture of sub-bundle.

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Key Engineering Materials (Volumes 434-435)

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45-47

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https://doi.org/10.4028/www.scientific.net/KEM.434-435.45

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Online since:

March 2010

Authors:

Cui Lin Han, Dong Lin Zhao, Lei Zhang, Zeng Min Shen

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C/SiC Composite, Mechanical Property, Three-Dimensional Needling

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