Method for coating a carbon substrate or a non-metallic containi

Details Method for coating a carbon substrate or a non-metallic containi Method for coating a carbon substrate or a non-metallic containi

1997-12-19

2000-09-05

Bareford, Katherine A.

Coating processes

Spray coating utilizing flame or plasma heat

Metal or metal alloy coating

427454, C23C 408

Patent

active

061139912

ABSTRACT:
To provide a substrate consisting of carbon or non-metallic materials containing carbon with a layer of a metal having a high melting point, first an undercoat layer is applied to the substrate by plasma spraying in an inert atmosphere. The undercoat layer predominantly consists of rhenium, molybdenum, zirconium, titan, chrome, niobium, tantalum, hafnium, vanadium, platinum, rhodium or iridium. Onto that undercoat layer, a covering layer can be applied, by plasma spraying as well. In order to reduce the thermo-mechanical stress and to improve the adhesion of the undercoat layer on the surface of the substrate, the substrate is preheated prior to applying the undercoat layer. By means of such a method, carbon-containing substrates can be provided with an undercoat layer and, if required, with a covering layer quickly and reliably at low costs.

REFERENCES:
patent: 4751099 (1988-06-01), Niino et al.
patent: 5045407 (1991-09-01), Ritter
patent: 5312650 (1994-05-01), Dalal et al.
patent: 5695883 (1997-12-01), Harada et al.

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