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Particle Velocity and Deposition Efficiency in the Cold Spray Process
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Particle Velocity and Deposition Efficiency in the Cold Spray Process
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Journal Article
Particle Velocity and Deposition Efficiency in the Cold Spray Process
1999
Overview
Copper powder was sprayed by the cold gas-dynamic method. In-flight particle velocities were measured with a laser two-focus system as a function of process parameters such as gas temperature, gas pressure, and powder feed rate. Mean particle velocities were uniform in a relatively large volume within the plume and agreed with theoretical predictions. The presence of a substrate was found to have no significant effect on in-flight particle velocities prior to impact. Cold-spray deposition efficiencies were measured on aluminum substrates as a function of particle velocity and incident angle of the plume. Deposition efficiencies of up to 95% were achieved. The critical velocity for deposition was determined to be about 640 m/s for the system studied.
Publisher
Springer,Springer Nature B.V
Subject
