Formation Of Refractory-Metal Carbide Coatings On Carbon-Fibers By A Reaction-Bonding Process
JOURNAL OF THE AMERICAN CERAMIC SOCIETY(1991)
摘要
Carbon fiber tows were impregnated by ethanolic solutions of refractory metal chlorides and fired at temperatures up to 2200-degrees-C to form metal carbide coatings incorporating carbon from the underlying substrate. Optimum firing sequences were determined for maximum metal carbide conversion. Fired tows were subsequently examined by X-ray photoelectron and Auger spectroscopy, scanning electron microscopy, and thermogravometric analysis to characterize the coated material. Coatings produced were stable under flowing air at a temperature of 800-degrees-C. This process is illustrated for the production of niobium-based coatings.
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关键词
carbon fiber,niobium,carbides,carbon,fibers
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