Preparation and Properties of SiC Porous Ceramics Made by Oxidation-Bonding Technique

Hong Fang Li; Yi Xia; Hong Ling Zhao

doi:10.4028/www.scientific.net/MSF.848.233

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HomeMaterials Science ForumMaterials Science Forum Vol. 848Preparation and Properties of SiC Porous Ceramics...

Preparation and Properties of SiC Porous Ceramics Made by Oxidation-Bonding Technique

Abstract:

SiC porous ceramics were prepared by oxidation-bonding technique using SiC powder as main material and carbon black as pore former. The phase composition, surface morphologies, bulk densities, porosities, mass and linear changes of the samples were also investigated. The physical-chemical properties have been analyzed. The results indicate that the oxidation reaction of SiC ceramics was accelerated with the increase of temperatures. It displays undamaged surface after 1400°C treatment, as well as fused surface after 1450°C treatment. The latter is attributed to violent oxidation reaction of SiC. As C contents increase, the porosities of the samples increase and the infiltration of O₂into interior of SiC ceramics was facilitated. The internal network microstructure is controlled by O₂ infiltration and SiO₂ coating.

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Periodical:

Materials Science Forum (Volume 848)

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233-236

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.848.233

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Online since:

March 2016

Authors:

Hong Fang Li*, Yi Xia, Hong Ling Zhao

Keywords:

Carbon Content, Oxidation-Bonding Technique, SiC Porous Ceramics

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