Patent ID: 6245390
Filing Date: 2001-06-12
Classification: B05B

Abstract:
A method of forming a coating or bulk material by depositing a material onto a substrate with high-velocity thermal spray apparatus, said method comprising the mixing of an oxidizer gas and a fuel in a mixing assembly, ignition and combustion of said oxidizer and fuel mixture in an internal burner, forming a high velocity gaseous jet of combustion products of said mixture in a gas expanding nozzle, introduction of selected spraying material into said jet with material delivery unit to form a stream of particles accelerated and heated by said jet below the melting point of said spraying material;wherein said method in addition comprises the use of a catalytic member in said internal burner to lower the combustion temperature of said mixture below the melting point of said spraying material when increasing the pressure and flow rate of said oxidizer or said fuel over stoichiometrical or when adding an inert gas into said mixture.