Two-Level Modeling of Phase-Formation Kinetics in the Synthesis of a Composite from Ti–Al–Fe₂O₃ Powders in 3D Technology

A two-level model for the synthesis of a composite from powders capable of chemical transformations is proposed. The process is controlled by laser action. Chemical transformations are modeled at the particle scale (in the reactive cell), where the controlling role of diffusion in the reaction mechanism is taken into account. The problem for the reactive cell is solved analytically, which is convenient for the numerical implementation of the entire model. The role of important parameters is demonstrated: laser beam power density, scanning width, and parameters characterizing heat loss. The possibility of controlling the phase structure is shown.