Influence of Fabricated Process on Mechanical Properties of Porous SiC-Particle/Si3N4 Composites

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In this paper, the mechanical properties of porous Si3N4/SiC composite prepared by different forming method (uniaxial pressing and gel-casting) were compared. Using gelcasting and two steps sintering technology, the porous SiC-particle/Si3N4 composites with a high strength, uniform structure and a relative high porosity were obtained by adding a little amount of nano carbon in slurry. The flexural strength of optimized material reaches to 100MPa and its porosity is more than 60%. But using uniaxial pressing and sintering at N2 atmosphere, because the green bodies have the high density, and the density distribution of a powder compact was not uniform, the flexural strength is not high, and at the same time, the microstructure is not uniform also.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1320-1323

DOI:

10.4028/www.scientific.net/KEM.336-338.1320

Citation:

H. J. Wang et al., "Influence of Fabricated Process on Mechanical Properties of Porous SiC-Particle/Si3N4 Composites", Key Engineering Materials, Vols. 336-338, pp. 1320-1323, 2007

Online since:

April 2007

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Price:

$38.00

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