In-flight particle velocity measurements with DPV-2000 in cold spray

Investigation of the microstructure and tribological behavior of cold-sprayed tin-bronze-based composite coatings

“…This may be due to the different impulse or momentum of different particles. Irregular particles are supposed to be accelerated more easily than the spherical particles, because a greater drag force exerted by the propelling gas may be experienced by the angular particles thanks to its relatively higher drag coefficient than the spherical particles [28][29]. Spherical QC particles may be less accelerated by propelling gas compared to the angular TiN particles, and thus, without considering of other influencing factors, the spherical QC particles may have a relatively lower impulse than the angular TiN particles during their impinging process.…”

Influence of Pre-Heated Al 6061 Substrate Temperature on the Residual Stresses of Multipass Al Coatings Deposited by Cold Spray

“…The average velocity of cold-sprayed aluminum particles with the parameters used in this study is about 650 mm/s ( Ref 9,21). The gun traverse speed was 100 mm/ s, the diameter of the spray spot on the substrate was about 10 mm and the single pass deposition thickness was about 250-300 lm.…”

The Influence of Powder Particle Velocity and Microstructure on the Properties of Cold Sprayed Copper Coatings

“…In particular, it has been shown that the air preheat temperature has an additional influence on the coating properties beyond its effect on particle velocity. When the Cu powder particle entrains the preheated air during the cold spray process, it gets heated and the extent of its heating depends on the time of contact between the particle and the hot air which in turn depends on the deLaval nozzle design and dimensions and also on the air pressure (Ref [13][14][15][16][17]. Unfortunately, measurement of the temperature of the particle has not been carried out.…”