Patent ID: 8334473
Filing Date: 2012-12-18
Classification: B23K,C23C,Y10T

Abstract:
1. A method for microplasma spray coating a turbine compressor blade, comprising: providing a microplasma gun including a housing, a nozzle, an external anode attached to an exterior surface of said housing, a cathode extending through said housing, and an arc generator; spacing said anode and said cathode from said turbine compressor blade to be coated; disposing an electrode forming part of said cathode so that said electrode extends through an aperture of said nozzle; disposing said anode within an anode holder mounted to said exterior surface of said microplasma gun and aligned opposite said nozzle; injecting inert arc gas from the nozzle; generating an electric arc between the anode and the cathode through the arc gas; ionizing the arc gas with the electric arc to form a plasma gas stream; injecting powdered material into the plasma gas stream; and coating a localized area of the compressor blade with the powdered material without masking the compressor blade.