Calculation of the equilibrium state and thermodynamic characteristics of plasma-forming gases and the plasma–“particle” system

Abstract

The composition and thermodynamic characteristics of plasma-forming gases (Ar, N₂, H₂, and mixtures Ar + N₂ and Ar + H₂) depending on temperature are investigated using thermodynamic modeling. The equilibrium composition and thermodynamic properties of the plasma–“particle” system are modeled. Pure metals, oxides, technical powders, and powder mixtures were considered as the particle. The influence of power materials TiO₂, Al₂O₃, and Fe₃O₄ on the variation in the plasma enthalpy is investigated. It is shown that computer modeling of the influence of thermodynamic parameters of the heterogeneous plasma jet makes it possible to optimize the modes of the plasma deposition and formation of plasma coatings. The proposed approach substantially shortens the time necessary to develop the formation technologies of coatings with the specified functional properties such as protective, antiwear, etc.