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Influence of Carbon Fiber Pre-Treatments on Interlaminar Shear Strength and Fracture Behavior of C/C Composites

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Abstract:

PAN-carbon fibers were pretreated using three methods. 2D-C/C composites were fabricated by a rapid chemical liquid-vaporized infiltration (CLVI) processing. Surface morphologies of carbon fiber pretreated and fracture micrographs of 2D-C/C composites were observed by scanning electron microscopy (SEM) and high resolution transmission electron microscope (HRTEM). The interlaminar shear strength(ILSS) of C/C composites was tested. The influences of carbon fiber surface pretreatments on ILSS and fracture behaviors of C/C composites were analyzed. The experimental results indicated that the C/C composite with carbon fiber coated CVI pyrocarbon possesses both higher flexural strength and interlaminar shear strength than composites with other fiber pretreatments. The fractographes revealed the differences in the mechanical behavior depending on the interface strength of fiber/matrix.

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Periodical:

Materials Science Forum (Volume 686)

Pages:

482-487

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.686.482

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Online since:

June 2011

Authors:

Wan Chang Sun, He Jun Li, Qian-Gang Fu, Shou Yang Zhang

Keywords:

Carbon/Carbon Composite, Fiber Surface Pre-Treatment, Interface, Mechanical Behavior, Rapid Densification

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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