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Molybdenum Oxycarbide and Tungsten Oxycarbide Coatings on Silicon Carbide Fibers
Author(s) -
Kmetz Michael,
Suib Steven L.,
Galasso Francis S.
Publication year - 1989
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.1151-2916.1989.tb07696.x
Subject(s) - materials science , coating , composite material , silicon carbide , tungsten , toughness , tungsten carbide , molybdenum , fiber , metallurgy
The strength and toughness of fibrous composites depend on the interface properties which control the bonding between the fibers and matrices. One method of controlling the interface involves coating the fiber with an appropriate material. In a previous study, it was found that there is a definite advantage in using low coating temperatures to prevent fibers from degrading. We therefore were interested in a report that Mo 2 C could be deposited from Mo(CO) 6 at temperatures as low as 300° to 475°C. Our studies indicated that the material was not Mo 2 C, but an oxycarbide, which, with an analogous tungsten oxycarbide coating, was applied to SiC yarns. Both oxycarbides could be converted to the metals by heat‐treating in N 2 .