C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/162, 117/53
C23C 4/12 (2006.01) C23C 4/10 (2006.01)
Patent
CA 2032172
Process for applying a coating of ceramic material on a substrate by plasma spraying. The material to be sprayed, which is incorporated in the plasma jet, includes a chemical compound one constituent of which is a nonmetallic element from the group N, C, B or from main groups VI or VII of the periodic classification, which decomposes, at least partially, in an inert environment before reaching the melting point and which is present in the solid phase in the applied state. To improve the process so that the chemical compound contained in the material can be applied to the substrate stiochiometrically, i.e., undecomposed, and form an impermeable, adherent, stable coating, the non-metallic element is incorporated in the plasma jet, in addition to the material to be sprayed, in a free form, not bound to a foreign element.
Processus d'application d'une couche de matière céramique sur un support, par projection en plasma. La matière, qui est incorporée dans le jet de plasma, inclut un composé chimique dont un des constituants est un élément non métallique du groupe N, C, B ou des groupes principaux VI ou VII du tableau périodique. Ce composé chimique se décompose, du moins partiellement, dans un environnement inerte avant d'atteindre le point de fusion et, une fois appliqué, est présent en phase solide. Pour améliorer le processus afin que le composé chimique contenu dans la matière puisse être appliqué sur le support de façon stoechiométrique, c.-à-d. non décomposée, et puisse former un revêtement stable, adhérent et imperméable, l'élément non métallique est incorporé dans le jet de plasma, en plus de la matière à projeter, sous forme libre et non liée à un élément étranger.
Henne Rudolf
Kabs Michael
Schiller Gunter
Schnurnberger Werner
Weber Winfried
Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.v.
Gowling Lafleur Henderson Llp
W.c. Heraeus Gmbh & Co. Kg.
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