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Fabrication of Silicon Carbide‐Mullite Composite by Melt Infiltration
Author(s) -
Tian Jintao,
Shobu Kazuhisa
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03274.x
Subject(s) - mullite , silicon carbide , fabrication , materials science , composite number , infiltration (hvac) , composite material , carbide , silicon , metallurgy , ceramic , medicine , alternative medicine , pathology
The melt infiltration method was used to fabricate a SiC‐mullite composite at high temperature. Mullite was successfully obtained from a SiO 2 and Al 2 O 3 powder mixture by melting above 1830°C in a BN crucible with a lid. When infiltrated into a porous SiC preform, the mullite significantly reacted with SiC to form gaseous SiO and CO, even at the lowest investigated temperature of 1830°C, consuming SiO 2 and leaving Al 2 O 3 and silicon phases in the sample. The relevant reactions were studied in detail. A closed system was adopted to suppress the reaction, and a dense composite was successfully obtained.