Slurry Composition for SiC Ceramics Foam and Sintering Performance

Abstract

Abstract: The slurry for SiC ceramics foam was dried, powdered, dry pressed and sintered in order to investigate the relation between composition and sintering performance. There is a proper proportion between
the content of sintering aids and flexural strength of samples. The creation of mullite phase is one of the reason to improve strength during sintering process, and the other reason is that SiC particles
are wrapped, connected in the glass phase created by sintering aids and alumina. In addition, open-pore ratio of the same composition samples decreases monotonously with the rise of sintering temperature,
but the change of flexural strength is not completely contrary with the change of open-pore ratio. Refractoriness of different composition samples keeps no change at 1730℃. The flexural
strength of the SiC ceramics foam fabricated with optimum composition and sintering temperature can reach 0.72MPa.

Key words: ceramics foam, silicon carbide, slurry, sintering performance

CLC Number:

TQ174

LIU Yan,HUANG Zheng-Ren,DONG Shao-Ming,YAO Xiu-Min,JIANG Dong-Liang. Slurry Composition for SiC Ceramics Foam and Sintering Performance[J]. Journal of Inorganic Materials.

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Slurry Composition for SiC Ceramics Foam and Sintering Performance

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