Journal article
Formation of carbon coatings on SiC fibers by selective etching in halogens and supercritical water
Ceramic engineering and science proceedings, v 19(3), pp 87-94
20 Jan 1998
Abstract
Carbon coatings can be obtained on silicon carbide fibres by selective etching that removes silicon from the surface layer of the fibre. A gas or fluid (chlorine, supercritical water, etc.) can be used. This approach allows the problems of uniformity and adherence of coatings to be solved, as well as avoiding bridging of filaments. The principal difference between the suggested method and other approaches is that the coating is not deposited on the surface of the carbide; rather the carbide surface is converted into carbon. This method can provide a simple and inexpensive route to carbon coatings (thickness from 10 nm to several microns) for a wide range of applications. It is shown that hydrothermal leaching produces a smooth and uniform carbon film on the surface of polymer-derived SiC fibres, although treatment of CVD fibres requires more effort. Similar carbon coatings have been obtained by halogenation of SiC fibres in chlorine-containing environments. 13 refs.
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Details
- Title
- Formation of carbon coatings on SiC fibers by selective etching in halogens and supercritical water
- Creators
- Y G GogotsiS WelzJ DaghfalM J McNallanI-D JeonK G NickelT Kraft
- Publication Details
- Ceramic engineering and science proceedings, v 19(3), pp 87-94
- Publisher
- Wiley
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Other Identifier
- 991014969855204721