Process and apparatus for coating a member by plasma spraying
AssigneeCommissariat a l'Energie Atomique
InventorsJean-Claude Dubust, Marcel Boncoeur, Bernard Hansz
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Abstract
The invention relates to a process and an apparatus for coating a member by plasma spraying. According to the invention, the pressure and composition of the atmosphere prevailing in the enclosure in which the operation takes place are constantly checked. The temperature of the member is regulated with the aid of a cooling system and the relative displacements of the member, the gun and the cooling system are automatically controlled. Application to the deposition of protective coatings on metal members or on composite materials.
Claims24
A process for coating a member by plasma spraying using a spray gun which is movable relative to the said member, the operation taking place under a controlled atmosphere within a tight enclosure wherein the pressure and composition of the atmosphere prevailing in the enclosure are maintained constant, the member is cooled in order to regulate the temperature of the different points thereof in accordance with a predetermined program, said operation being carried out with the aid of a cooling system which is movable with respect to said member, and wherein the relative displacements of the member, gun and cooling system are controlled automatically.
An apparatus for coating a member by plasma spraying, wherein it comprises a tight enclosure containing a movable support for the member to be coated, a plasma spray gun movable with respect to said member, a cooling system which is also movable relative to said member, temperature sensors for checking the temperature of the member and of the atmosphere prevailing in the enclosure, as well as means for analyzing the gas in the enclosure, means for scavenging the enclosure with the aid of a gas and a device for synchronizing the relative movements of the member, the gun and the cooling system.
Dependencies are inferred from the claim text.