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Pillared Smectite Clay Coatings for Ceramic‐Matrix Composites
Author(s) -
Jagota Sujata,
Harmer Mark A.,
Lemon Michael F.,
Jagota Anand,
McCarron Eugene M.
Publication year - 1995
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.1151-2916.1995.tb08647.x
Subject(s) - materials science , borosilicate glass , mullite , composite material , silicon carbide , ceramic , ceramic matrix composite , kaolinite , bentonite , clay minerals , fiber , sintering , oxide , matrix (chemical analysis) , aluminium silicate , mineralogy , chemical engineering , metallurgy , chemistry , engineering
This paper describes a novel route for the low‐temperature formation of mullite, from pillared smectite clay precursors, for use as fiber coatings in ceramic‐matrix composites. In particular, alumina‐pillared bentonite converts in part to mullite at the unusually low temperature of about 800°C. The clay precursors display excellent film‐forming capability and have been coated onto silicon carbide fibers. Mechanical tests on composites of the coated fibers and a borosilicate glass demonstrate their success as debond coatings, suggesting that this approach is a viable and simple route to oxide coatings for fibers.