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Mullite Coatings on SiC and C/C–Si–SiC Substrates Characterized by Infrared Spectroscopy
Author(s) -
Rüscher Claus H.,
Fritze Holger,
Borchardt Günter,
Witke Thomas,
Schultrich Bernd
Publication year - 1997
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.1151-2916.1997.tb03256.x
Subject(s) - mullite , materials science , amorphous solid , spectroscopy , infrared spectroscopy , substrate (aquarium) , coating , chemical engineering , analytical chemistry (journal) , composite material , crystallography , chemistry , ceramic , physics , oceanography , organic chemistry , chromatography , quantum mechanics , geology , engineering
Mullite (3Al 2 O 3 ·2SiO 2 ) coatings on SiC substrates and SiC precoated carbon/carbon composite (C/C‐Si‐SiC) substrates were produced by pulsed laser deposition (PLD) using pressed mullite powder targets. The layers can be characterized efficiently by IR reflection spectroscopy in the spectral range between 650 and 5000 cm −1 . The deposited coatings turn into mullite upon oxidation in air at temperatures between 1400° and 1600°C. Fabry‐Perot interferences indicate a high quality and homogeneity of the mullite coating/SiC substrate interface. Amorphous SiO 2 gradually forms during prolonged heating or at higher temperatures.