Effect of CNT impregnation on the mechanical and thermal properties of C/C-SiC composites

Date

2020-06-01

Author

Tulbez, Simge
ESEN, ZİYA
Dericioğlu, Arcan Fehmi

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The present study investigates the effect of additional carbon source, in the form of carbon nanotubes (CNTs), on mechanical and thermal properties of carbon fiber reinforced silicon carbide (C/C-SiC) ceramic matrix composites (CMC) produced by liquid silicon infiltration (LSI) technique. The CNTs used in this study were impregnated into the C/C preforms before the liquid silicon infiltration stage. The results showed that the addition of excess carbon to the C/C preforms in the form of CNTs enhanced Si infiltration efficiency significantly resulting in C/C-SiC composites with higher density and microstructural uniformity. Accordingly, the addition of CNTs improved the flexural strength of the composites by 40% with respect to no-CNT-containing composites due to a lower amount of residual porosity and additional reinforcement effect of the unreacted CNTs. The thermal conductivity of the resulting C/C-SiC composites has been also increased by 31% and 18% parallel and perpendicular to the carbon fiber-woven fabric surface, respectively, by CNT addition.Graphical abstract

URI

https://hdl.handle.net/11511/88510

Journal

ADVANCED COMPOSITES AND HYBRID MATERIALS

DOI

https://doi.org/10.1007/s42114-020-00155-3

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

S. Tulbez, Z. ESEN, and A. F. Dericioğlu, “Effect of CNT impregnation on the mechanical and thermal properties of C/C-SiC composites,” ADVANCED COMPOSITES AND HYBRID MATERIALS, pp. 177–186, 2020, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88510.