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DPV evolution™ individual particle diagnosis system

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In thermal spray, a material initially in the form of solid powder or wire is fed to the high-temperature spray torch to be melted and accelerated toward the parts to be coated. Before impinging on the substrate, the material is in the form of liquid droplet/particles, ranging from 1 to 150 microns in size, depending on the application. The particles typically travel at velocities from 50 to 1200 m/s, depending on the type of process/spray conditions used and their surface temperature may vary from 1,000° to 3,500° Celsius. The Dpv evolution measures the infrared radiation emitted by the liquid droplets and uses that data to calculate the individual particle’s temperature, velocity and size.