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Plasma Sprayed Hydroxyapatite Coatings Modified With Silver Nanoparticles

“…Particle temperature histogram shows narrow spread in values with relatively sharp maximum near 1800 o C that is higher than HA melting point (1100 o C). According to simulation of particle heating in plasma jet the average particle volume temperature is less than surface temperature by 800 o C-1500 o C for particles in the range 50-150 µm [21]. As a result, nominal spraying parameters ensure melting only surface layers of individual particle that is a necessary condition for formation of high quality coating.…”

Nonuniform absorption of thermal radiation in semitransparent spherical particles under conditions of arbitrary illumination of a disperse system

“…The problem (17)-(20) for an individual particle is readily solved numerically [6,7]. At the same time, an approximate analytical solution of this problem is of interest from the standpoint of its incorporation into modern computer programs (the so-called CFD codes) and for practical calculations of disperse systems in view of complex flow and heat transfer,.…”

“…It proves necessary to take into account the nonuniformity of the radiation field within semitransparent particles both in the case of significant thermal selfradiation of nonisothermal particles [5][6][7] and in the case of relatively cold particles when the absorbed radiation affects the chemical or phase transformations within a particle. The problems of the latter type include, for example, the heating and evaporation of droplets of fuel in a diesel engine [8][9][10][11][12][13][14], as well as the similar problem for droplets of water in a water curtain used for fire localization [15][16][17][18][19][20].…”