Carbide Coatings on Graphite Fibers by Liquid Metal Transfer Agent Method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)227-230
Journal / PublicationJournal of the American Ceramic Society
Volume65
Issue number5
Publication statusPublished - May 1982
Externally publishedYes

Abstract

Titanium and zirconium carbide layers were produced on the surface of graphite fibers. The process allows a controlled reaction of the fibers with the carbide‐forming elements dissolved hi a molten tin bath, which acts as the transferring medium. The coatings were analyzed by optical and scanning electron microscopy, energy dispersive X‐ray analysis, and X‐ray diffraction. It was found that they consist of two distinct layers, one with the binary carbide composition in contact with the fiber core and an exterior one having a ternary carbide composition. The coatings are brittle, continuous, and uniform along and across the fibers and show good adherence to the carbon core. The carbide growth process is diffusion‐controlled with an activation energy of 184 kJ/mol. The coated fibers are readily wetted by molten aluminum. Copyright © 1982, Wiley Blackwell. All rights reserved

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