Method and apparatus for the coating and for the surface treatment of substrates by means of a plasma beam
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Apr 3, 2009
filing date -
Apr 4, 2008
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Abstract
For the coating and for the surface treatment of substrates by means of a plasma beam a working chamber (2) with a plasma torch (4) is made available, a plasma beam (5) is produced in that a plasma gas is directed through the plasma torch (4) and is heated in the same by means of electrical gas discharge, electromagnetic induction or microwaves, and the plasma beam (5) is directed onto a substrate (3) introduced into the working chamber, wherein the plasma torch (4) which is made available has a power for the thermal plasma spraying of solid material particles. During the coating and/or the surface treatment, the pressure in the working chamber (2) amounts to between 0.01 and 10 mbar, and at least one reactive component in liquid or gaseous form is injected into the plasma beam (5) in order to coat the surface of a substrate (3) or to treat it.
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