Dey, Atanu and Kayal, Nijhuma and Chakrabarti, Omprakash (2011) Preparation of mullite bonded porous SiC ceramics by an infiltration method. Journal of Materials Science, 46 (16). pp. 5432-5438. ISSN 0022-2461

[img] PDF - Published Version
Restricted to Registered users only

Download (0b) | Request a copy


A powder compact of alpha-SiC and alpha-Al(2)O(3) was infiltrated with a liquid precursor of SiO(2), which on subsequent heat treatment at 1500 A degrees C produced a mullite bonded porous SiC ceramics. Results showed that infiltration rate could be estimated by using weight gain measurements and theoretical analysis. The bond phase was composed of needle-shaped mullite which was observed to be grown from a siliceous melt formed during the process of oxide bonding. The porous SiC ceramics exhibited a density and porosity of 2 g cm(-3) and 30 vol%, respectively, and also a pore size distribution in a range of 2-15 mu m with an average pore size of 5 mu m. No appreciable degradation of room temperature flexural strength (51 MPa) was observed at high temperatures (1100 A degrees C).

Item Type: Article
Subjects: Processing Science
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Jan 2012 12:10
Last Modified: 31 Jan 2013 11:32

Actions (login required)

View Item View Item