Modelling of Motion and Heating of Powder Particles in Laser, Plasma and Hybrid Spraying

Mathematical models for simulation of motion and heating of fine ceramic particles in plasma and laser spraying, as well as under conditions of a new technological process, i.e. hybrid laser-plasma spraying, are proposed. Trajectories, velocities and temperature fields of fine SiO₂ particles being sprayed using the argon plasma jet, CO₂-laser beam and their combination have been calculated. It is shown that the space-time distribution of temperature in spray particles greatly depends upon the spraying method.