Pressureless Melt Infiltrated Non-Oxide Ceramic-Metal Composites

Abstract:

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In the present study highly dense (open porosity < 1 %), light-weight (d £ 2.85 g/cm3) and Al4C3-free non-oxide ceramic-metal composites were produced at comparatively low temperatures ( 1250°C) by pressurless melt infiltration. Phase analysis of the SiC-B4C-Al composites revealed that a significant amount of hygroscopic Al4SiC4 and Al4C3 phases were formed. Si3N4 powder was added in different amounts to the SiC-B4C powder batches to suppress formation of these phases via in-situ reactions during the infiltration process. X-ray diffraction results of the SiC-B4C-Si3N4-Al composites confirmed that the incorporation of Si3N4 to the SiC-B4C system reduced or eliminated the formation of the hygroscopic phases and resulted in in-situ formation of AlN, SiC and Si phases in the composite.

Info:

Periodical:

Edited by:

Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo

Pages:

251-252

DOI:

10.4028/www.scientific.net/KEM.403.251

Citation:

A. Kalemtas et al., "Pressureless Melt Infiltrated Non-Oxide Ceramic-Metal Composites", Key Engineering Materials, Vol. 403, pp. 251-252, 2009

Online since:

December 2008

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Price:

$35.00

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