Obrabotka Metallov 2015 No. 2

ОБРАБОТКА МЕТАЛЛОВ № 2 (67) 2015 30 ТЕХНОЛОГИЯ Abstract Amathematical description of the process of spreading and simultaneous solidification of the liquid particles, when it collides with the solid surface of the substrate is presented and approximate numerical methods for the calculation are constructed in the article. These algorithms are a continuation of numerical studies on the development of approximate methods of calculation, which examined simplified models for individual variables, such as temperature in the particle, in the substrate, in the contact area, for finding the velocity field for determining the shape of the spreaded particle. The developed model allows carrying out numerical experiments to study the collision process of an individual drop with the spatial surface and its’ spreading, as well as the formation of the structure of plasma coatings. The results show that the numerical methods are quite effective in the study of nonlinear problems. On the basis of experimental studies of processes of interaction of the particles with the substrate and spreading on it the adequacy of the developed theoretical dependencies is shown. Keywords: particle, simulation, algorithm, velocity fields, flow and solidification processes, plasma spraying, thermal barrier coatings. DOI: 10.17212/1994-6309-2015-2-24-31 References 1. Nichols B.D., Hirt C.W., Hotchkiss R.C. SOLA-VOF: A solution algorithm for transient fluid flow with mul- tiple free boundaries. Report LA-8355 (US-32 and US-34). Los Alamos, Los Alamos National Scientific Laboratory Publ., 1980. 58 p. 2. Kudinov V.V., Pekshev P.Yu., Belashchenko V.E., Solonenko O.P., Safiullin V.A. Nanesenie pokrytij plazmoj [Plasma Coating]. Moscow, Nauka Publ., 1990. 408 p. ISBN 5-02-006040-2 3. Solonenko O.P., Smirnov A.B. Soudarenie kapli rasplava s poverkhnost’yu: teoriya i model’nyi eksperiment [Collision of a melt drop with a surface: theory and a model experiment]. Doklady Akademii nauk – Doklady Earth Sciences , 1998, vol. 363, no. 1, pp. 46–49. (In Russian) 4. Fukanuma H. A porosity formation and flattening model of an impinging molten particle in thermal spray coat- ings. Journal of Thermal Spray Technology , 1994, vol. 3, iss.1, pp. 33–44. doi: 10.1007/BF02648997 5. Panteleenko F.I., Okovity V.A., Talako T.L., Devoino O.G., Panteleenko A.F., Okovity V.V. Issledovanie struk- tury plazmennykh iznosostoikikh pokrytii na osnove oksidnoi keramiki s vklyucheniyami tverdoi smazki [Investi- gation of plasma wear resistance coating structure on basis of oxide ceramics with inclusions of solid lubrication]. Nauka i tekhnika – Science and Technique , 2013, no. 5, pp. 15–21. (In Russian) 6. Devoino O.G., Okovity V.V. Kompozitsionnyi poroshok na osnove dioksida tsirkoniya, chastichno stabi- lizirovannyi oksidom tseriya [Composite powder based on zirconium dioxide and partially stabilized by cerium oxide]. Nauka i tekhnika – Science and Technique , 2013, no. 6, pp. 3–8. (In Russian) 7. Gromyko G.F., Zayats G.M., Il’yushchenko A.F., Kundas S.P. [Simulation of spreading and solidification of particle during plasma spraying]. Respublikanskii mezhvedomstvennyi sbornik nauchnykh trudov NAN Belarusi “Po- roshkovaya metallurgiya” [The Republican Interdepartmental Proceedings of NASB “Powder Metallurgy”], 1999, iss. 22, pp. 101–107. (In Russian) 8. Il’yushchenko A.F., Okovity V.A., Shevtsov A.I., Gromyko G.F. Modelirovanie protsessov gazotermicheskogo napyleniya pokrytii [Modelling of processes of thermal spraying coatings]. Minsk, Besprint Publ., 2008. 264 p. 9. Gromyko G.F., Il’yushchenko A.F., Shevtsov A.I., Okovity V.V. [Simulation of processes of generation of heat-protection coatings on the basis of double oxide zirconium stabilized with oxides of rare-earth metals]. Respub- likanskii mezhvedomstvennyi sbornik nauchnykh trudov NAN Belarusi “Poroshkovaya metallurgiya” [The Republi- can Interdepartmental Proceedings of NASB “Powder Metallurgy”], 2013, iss. 36, pp. 36–40. (In Russian) 10. Kundas S., Gurevich V., Ilyuschenko A., Okovity V. Simulation and experimental studies of particles inter- action with plasma jet in vacuum plasma spraying processes. Journal of Advanced Materials , 2000, vol. 32, iss. 3, pp. 3–11. 11. Kundas S.P., Il’yushchenko A.F., Okovity V.A. [Stress relaxation in plasma coating due to the formation of cracks]. Respublikanskii mezhvedomstvennyi sbornik nauchnykh trudov NAN Belarusi “Poroshkovaya metallurgiya” [The Republican Interdepartmental Proceedings of NASB “Powder Metallurgy”], 2002, iss. 25, pp. 79–84. (In Rus- sian)