Patent ID: 8001927

Claim:
Plasma spraying device for spraying a coating onto a substrate by a thermal spray process, said plasma spraying device comprising: a plasma torch for heating up a plasma gas in a heating zone, wherein the plasma torch includes a nozzle body for forming a plasma gas stream, said plasma torch having an aperture running along a central longitudinal axis through said nozzle body, which aperture has a convergent section with an inlet for the plasma gas, a throat section including a minimum cross-sectional area of the aperture, and a divergent section with an outlet for the plasma gas stream, wherein an introducing duct is provided for introducing a liquid precursor into the plasma gas stream, wherein a penetration groove is provided in order to penetrate the liquid precursor inside the plasma gas stream, wherein the penetration groove comprises a triangular shape, wherein the penetration groove includes a step arranged to produce strong turbulences in the plasma gas stream downstream of the introducing duct.