Method and device for generating an activated gas curtain for surface treatment
First Claim
1. A method for the treatment of surfaces or for the formation of powders on a surface includes initiating an electric arc of stabilised plasma, generating a jet of activated gas in the form of a curtain from said electric arc substantially perpendicularly to the axis A of said electric arc and projecting the curtain of activated gas on the surface to be treated, wherein the distance L of the axis A of the electric arc from the surface to be treated, as well as the speed v of the stream of activated gas are adjusted in such a manner that the particles of the curtain of activated gas be electrically neutral and in a metastable state at the moment contact with the surface to be treated.
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Accused Products
Abstract
The invention relates to a surface treatment device comprising: electrodes (24a, 24b) that are used to initiate an electric arc of stabilised plasma (14); a stabilising channel (12) which is disposed in a body (10) in order to confine the electric arc of stabilised plasma; conduits (38, 39) which are disposed in the body and used to introduce a treatment gas Q1, uniformly distributed along the arc, upstream of the arc in a direction that is essentially perpendicular to axis A of said arc in such a way as to form an activated gas curtain (8); means for introducing a complementary treatment gas Q2 downstream of the electric arc; and a support (28) that is used to hold the object or material to be treated in place and to position the object or material surface to be treated in relation to the body (10).
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Citations
25 Claims
- 1. A method for the treatment of surfaces or for the formation of powders on a surface includes initiating an electric arc of stabilised plasma, generating a jet of activated gas in the form of a curtain from said electric arc substantially perpendicularly to the axis A of said electric arc and projecting the curtain of activated gas on the surface to be treated, wherein the distance L of the axis A of the electric arc from the surface to be treated, as well as the speed v of the stream of activated gas are adjusted in such a manner that the particles of the curtain of activated gas be electrically neutral and in a metastable state at the moment contact with the surface to be treated.
Specification