Development of Optical Monitoring of the Thermal Spraying

A new approach has been made in monitoring of the thermal spraying. Monitoring of the process is based on visualization of particles movement using both high speed video camera and wide-band high intensive illumination and measurements of particles temperature velocity and size and their distribution. Synchronously with the registration of the particles parameters surface temperature of the coating has been measured with 2-channel pyrometer with a high spatial and a temporal resolution. The results of investigations of the Cold spraying and D-gun spraying are presented.