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Title: Method of fabricating silicon carbide coatings on graphite surfaces

The vacuum plasma spray process produces well-bonded, dense, stress-free coatings for a variety of materials on a wide range of substrates. The process is used in many industries to provide for the excellent wear, corrosion resistance, and high temperature behavior of the fabricated coatings. In this application, silicon metal is deposited on graphite. This invention discloses the optimum processing parameters for as-sprayed coating qualities. The method also discloses the effect of thermal cycling on silicon samples in an inert helium atmosphere at about 1,600 C which transforms the coating to silicon carbide. 3 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
7166869
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-131584
Patent Number(s):
US 5332601; A
Application Number:
PPN: US 7-988598
Contract Number:
AC07-76ID01570
Resource Relation:
Patent File Date: 10 Dec 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GRAPHITE; SPRAYED COATINGS; SILICON CARBIDES; PLASMA ARC SPRAYING; CONTROLLED ATMOSPHERES; ATMOSPHERES; CARBIDES; CARBON; CARBON COMPOUNDS; COATINGS; DEPOSITION; ELEMENTAL MINERALS; ELEMENTS; MINERALS; NONMETALS; SILICON COMPOUNDS; SPRAY COATING; SURFACE COATING; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication