C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 4/12 (2006.01) B05D 1/08 (2006.01) H05H 1/26 (2006.01) H05H 1/42 (2006.01)
Patent
CA 2591017
The invention relates to a plasma spraying device (1) for spraying a coating (2) onto a substrate (3) by a thermal spray process. Said plasma spraying device (1) includes a plasma torch (4) for heating up a plasma gas (5) in a heating zone (6), wherein the plasma torch (4) includes a nozzle body (7) for forming a plasma gas stream (8), and said plasma torch (4) having an aperture (9) running along a central longitudinal axis (10) through said nozzle body (7). The aperture (9) has an convergent section (11) with an inlet (12) for the plasma gas (5), a throat section (13) including a minimum cross-sectional area of the aperture, and a divergent section (14) with an outlet (15) for the plasma gas stream (8), wherein an introducing duct (16) is provided for introducing a liquid precursor (17) into the plasma gas stream (8). According to the invention a penetration means (18, 161, 181, 182) is provided to penetrate the liquid precursor (17) inside the plasma gas stream (8). The invention relates also to method for introducing a liquid precursor (17) into a plasma gas stream (8) as well as to the use of a plasma spraying device (1) and a method in accordance with the present invention for coating a surface of a substrate (3).
Barbezat Gerard
Dorier Jean-Luc
Hollenstein Christoph
Refke Arno
Fetherstonhaugh & Co.
Sulzer Metco Ag
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