Vliyanie sily tyazhesti na dvizhenie chastits titanovogo poroshka v plazmennom potoke

Abstract

An attempt is presented to determine the influence of the spray direction on the particles movement in a plasma flow in order to assess the influence of gravity. Three spray directions are selected: down, up and horizontal. Titanium powder PTM-1 TU 14-22-57-92 was considered. For each of the spraying directions under consideration, the movement of titanium powder particles of different dispersion in the plasma flow was calculated using the finite element method with using the SolidWorks software package. Particles with sizes of 1, 50 and 90 microns were selected as the sprayed powder material. The change in the temperature of powder particles when moving in a plasma flow depending on the direction of spraying has been studied. A comparative analysis was carried out for the spraying directions under consideration, based on the results of which the advantages and disadvantages were described and recommendations were given for conducting the processes of obtaining powder and applying coatings. The presented data can be useful when choosing the position of the substrate for applying functional coatings. The influence of gravity on the separation of the resulting powders and on the temperature distribution of the plasma flow in the studied area is demonstrated. To verify the calculation results, a full-scale experiment was carried out in a plasma installation assembled at the IMET Ural Branch of the Russian Academy of Sciences, which is used for producing powder and applying coatings, taking into account its design features. The results have practical benefits for developers and consumers of technological equipment.