The aim of this paper is to develop a model that describes the heating of porous aluminum oxide particles in the plasma jet of the APS process. The model is then used to analyze sintering effects and thermal gradients in particles of varying porosity in-flight. Paper includes a German-language abstract.

Most metallic and ceramic splats exhibit temperature-dependent behavior when they strike a metal substrate and assume a shape that suggests temperature-dependent wetting properties. In this study, the authors investigate the relationship between high-temperature oxidation, substrate morphology, and the flattening behavior of free-falling droplets. Substrate surfaces are examined by means of atomic force microscopy, which shows that changes in morphology of just a few nanometers can have an effect on flattening behavior. Paper includes a German-language abstract.

This paper investigates the influence of process parameters on plasma sprayed particles. Through simulations, the authors show that particle velocity is largely a function of trajectory, which is influenced by plasma composition, powder properties, injection velocity, particle size distribution, and kinetic energy. Depending on kinetic energy, the particles are deflected by the high viscous region around the flow core, they enter the core, or they pass through it into the slow outer flow on the opposite side. Paper includes a German-language abstract.