Microstructure and Properties of Carbon-Ceramic Composite Prepared by Hot-Pressing Sintering

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The recrystallized carbon-ceramic composites were prepared from calcined coke, coal-tar pitch and Cr by hot-press to investigate the effects of Cr on the physical properties, mechanical properties and microstructure of recrystallized graphite. Experimental results showed that Cr doped recrystallized graphites exhibited higher bending strength and compressive strength and lower electrical resistivity when the Cr content is10wt% compared with pure graphite. Microstructural analyses revealed that the degree of graphitization of recrystallized graphite increased and the layers spacing of microcrystalline decreased with increasing the Cr concentration. XRD analysis indicated that Cr added to the carbon substrate was in the form of C, Cr2C3 and Cr2O3. The catalytic mechanism of Cr dopant to accelerate the graphitization of carbon substrates can be explained by the mechanism of decomposition of the carbide.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1168-1171

DOI:

10.4028/www.scientific.net/KEM.336-338.1168

Citation:

Y. J. Qiao et al., "Microstructure and Properties of Carbon-Ceramic Composite Prepared by Hot-Pressing Sintering", Key Engineering Materials, Vols. 336-338, pp. 1168-1171, 2007

Online since:

April 2007

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Price:

$35.00

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