Conclusions
Measurements have been made on the trends in the formation of heterogeneous plasma flows in a coaxial plasma accelerator as affected by the design and technological parameters.
There are large spreads in the thermokinetic and concentration parameters when the powder is supplied to a cylindrical tube in the accelerator. The optimum heterogeneous-flow organization is obtained in a new plasma accelerator design that provides a uniform particle distribution in velocity and concentration in the cross section of the plasma jet and compression of the plasma cloud along the jet. The powder use factor is increased by a factor 1.3-1.5.
An Ar+H2 mixture as the plasma-forming gas gives high-grade homogeneous coatings with low porosity.
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L. A. Gasin and B. A. Uryukov, “Particle motion and heating in a coaxial accelerator,” Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Tekh. Nauk, Issue 3, No. 16, 92–100 (1985).
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Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 27, No. 4, pp. 60–66, July–August, 1991.
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Golubets', V.M., Shvets', V.V. & Lukina, G.M. Heterogeneous flux formation in plasma pulse deposition. Mater Sci 27, 385–390 (1992). https://doi.org/10.1007/BF00723230
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DOI: https://doi.org/10.1007/BF00723230