Modeling the synthesis of composite coatings using 3D laser technology from powder mixtures capable of exothermic transformations

The paper presents a description for two-level model of coating synthesis on a substrate with separation of physical processes by spatial scales. This model fits the case of laser technology of a composite with the strengthening particles in-situ synthesized. The temperature field is described by a macro-problem. The variation in phase composition is modeled at the level of reaction cells within the reactive diffusion theory. These problems are interrelated. The quasi-stationary regime of synthesis is rather exception than a rule. It was shown that the dynamics for samples of various sizes are different. The conclusion on the process options in a controlled quasistationary regime can be drawn only after evaluating the spatial scales and numerical simulations.