Particle velocity and deposition efficiency in the cold spray process

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 with...

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Bibliographic Details
Published inJournal of thermal spray technology Vol. 8; no. 4; pp. 576 - 582
Main Authors GILMORE, D. L, DYKHUIZEN, R. C, NEISER, R. A, ROEMER, T. J, SMITH, M. F
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.12.1999
Springer Nature B.V
Subjects
Aluminum
Applied sciences
Copper powder
Deposition
Exact sciences and technology
Feed rate
Gas dynamics
Gas temperature
Laser applications
Lasers
Metallic coatings
Metals. Metallurgy
Particles (particulate matter)
Plumes
Production techniques
Protective coatings
Sprayers
Sprays
Substrates
Surface treatment
Cold process
Metal coating
Aluminium base alloys
Gas dynamics
Atomization
Copper
Spray coating
Velocity
Surface treatment
Deposition process
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1059-9630
1544-1016
DOI:10.1361/105996399770350278