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Fabrication and Characterization of Near‐Net‐Shape In Situ Reaction‐Bonded Porous Cordierite/SiC Ceramics
Author(s) -
Liu Shifeng,
Zeng YuPing,
Jiang Dongliang
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12164
Subject(s) - cordierite , materials science , sintering , ceramic , microstructure , fabrication , porosity , thermal expansion , stoichiometry , composite material , mineralogy , chemical engineering , chemistry , engineering , medicine , alternative medicine , pathology
Porous cordierite/ S i C ceramics were fabricated by in situ reaction bonding using α‐ S i C , α‐ A l 2 O 3, and M g O powders as the starting materials. During sintering, part S i C is oxidized to S i O 2 and then the latter reacts with A l 2 O 3 and M g O to form cordierite. As a result, porous cordierite/ S i C ceramics were obtained, and the ceramics are strengthened by the residual S i C . Due to the large volume expansion introduced by the oxidation of S i C , the ceramics exhibit small sintering‐induced dimension variations. In addition, a fine‐grained microstructure and good thermal and mechanical properties were obtained for the porous cordierite/ S i C ceramics.