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Microstructural Characterization of Carbon Fiber-Reinforced Laminated Matrix Composites of Silicon Carbide and Carbon

Published online by Cambridge University Press:  02 July 2020

K. A. Appiah ,
Z. L. Wang  and
W. J. Lackey
K. A. Appiah
Affiliation:
Department of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332
Z. L. Wang
Affiliation:
Department of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332
W. J. Lackey
Affiliation:
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332
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Extract

Silicon carbide composites are known for high-temperature strength retention, creep resistance, high elastic modulus and light weight. Laminated matrix composites (LMC's) with a matrix of alternating layers of silicon carbide (SiC) and carbon (C) with carbon fiber reinforcements possess added toughness in addition to the desirable properties of SiC composites mentioned above. The improved toughness results from both the laminated matrix, which offers a tortuous path to crack propagation, and the energy expended in fiber debonding during fracture. Microstructural analyses of LMC's are necessary to help the processing effort to achieve structures with the desired properties. In this work, a preliminary examination of the microstructure of the laminated matrix composite is undertaken using TEM.

Specimens for TEM examination were prepared by cutting slices from a bulk sample of ∼ 1 mm thickness with a low-speed diamond saw. The slices were then ground to no less than 200 μm thickness to prevent the slices from breaking.

Type
Microscopy of Ceramics and Minerals
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 568 - 569
Copyright
Copyright © Microscopy Society of America

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References

References:

1.Lackey, W. J., et. al. J. Am. Ceram. Soc, 80[1] 113–116 (1997).CrossRefGoogle Scholar
2. This work was supported by The Packard Foundation and NSF (DMR-9632823).Google Scholar