Low-Temperature Sintering of α- and β-SiC Powders with AlB2 Additive

Abstract:

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We sintered α (6H)- and β(3C)-SiC powders using an Al-B-C additive. SiC powders were densified to > 98% of the theoretical density from 1950 to 2150oC with 0.67-2.7 mass % AlB2 and 2.0 mass % C. Sintering temperatures are 150-200 oC lower than the conventional. During sintering, 6H polytype in α-SiC powder was partly transformed to 4H. α-SiC powder grew moderately into plate-shaped grains. β-/SiC powder was completely transformed to 6H and subsequently 4H with large grain growth. Low-temperature sintering enabled us to use hot isostatic pressing resulting in pore-free SiC materials.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

23-26

DOI:

10.4028/www.scientific.net/KEM.317-318.23

Citation:

H. Tanaka et al., "Low-Temperature Sintering of α- and β-SiC Powders with AlB2 Additive", Key Engineering Materials, Vols. 317-318, pp. 23-26, 2006

Online since:

August 2006

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Price:

$35.00

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