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Extra resources for Cold Spray Materials Deposition Process

Example text

Data 12 are the results of an experiment, obtained under test conditions used in computations. The development of the cold spray process 25 the particle velocity (points 12) under the test conditions used in the computations. 1] Another comparison of numerical results with the experimentally determined velocity of various particles at the nozzle exit is shown in Fig. 12 in the form of the particle velocity versus the particle size. The continuous curves with squares show the numerically calculated velocity of particles at the nozzle exit, accelerated by air and helium jets.

1990). The majority of experiments were performed with aluminum particles for the following reasons: • It was with aluminum particles that the effect of coating formation in an external flow was detected. Therefore, it was important to continue investigations with the same particles to compare the results. • The possibility of obtaining high particle velocities (vp ≈ 1000 m/s) because of the low density of aluminum particles being accelerated in a gas flow. • The high probability of observing a possible effect of particle-material melting at the moment of the particle–substrate collision because of the comparatively low melting point of aluminum (670 °C).

Journal of Applied Mechanics and Technical Physics, 39(2), 318–324. Alkhimov A P, Klinkov S V and Kosarev V F, 2001. The features of cold spray nozzle design. Journal of Thermal Spray Technology, 10(2), 375–381. Bartenev S S, Fedko Y P and Grigirov A I, 1982. Detonation Coatings in Machine Building, Leningrad: Mashinostroenie (in Russian). Browning J A, 1997. What if we are right? United Thermal Spray Conference and Exposition, September 15–18, 1997, Indiana. Gabel H and Tapphorn R, 1998. Coating or ablation applicator with debris recovery attachment.

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