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Fiber Coatings for SiC‐Fiber‐Reinforced BMAS Glass‐Ceramic Composites
Author(s) -
Sun Ellen Y.,
Nutt Steven R.,
Brennan John J.
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.tb02823.x
Subject(s) - materials science , composite material , fabrication , fiber , coating , composite number , ceramic matrix composite , ceramic , microstructure , transmission electron microscopy , fiber reinforced composite , silicon carbide , glass fiber , nanotechnology , medicine , alternative medicine , pathology
Interfaces in SK‐fiber‐reinforced glass‐ceramic matrix composites were modified by applying different coatings to the fibers and varying the coating thickness. Coatings of SiC/BN, Si 3 N 4 /BN, and BN were applied to the fibers by CVD prior to composite fabrication. Interfacial microstructures were characterized using high‐resolution and analytical transmission electron microscopy. Oxidation of the SiC fibers during composite fabrication was suppressed by the fiber coatings, provided that the coatings were sufficiently thick to prevent oxygen diffusion from the matrix. The SiC/RN and BN coatings were stable during high‐temperature exposures, while the Si 3 N 4 /BN coating underwent chemical reactions.