Estimation of the stresses in a coating growing on a flat plate under nonisothermal conditions

Abstract

A mathematical model of a coating which grows during magnetron sputtering has been formulated and investigated. To estimate the average mechanical stresses, both the thermal and the chemical diffusion contribution are taken into account. It has been shown that the kinetics of the reaction on the surface is no less important in the evolution of stresses than the relationship between the mechanical properties of the growing coating and of the substrate.

Effect of protective release coatings on the basis of superdispersersed zirconium oxide powder on the formation of gas defects in bronze casting

“…During the first moments after pouring the melt into the mold the binder (in our case, industrial oil) is burned out, the evidence of which are the flames coming from the gating system. Gas gap occurs typically between the mold wall and the molten metal [9]. This resultant gas goes outwardly partially along the mold surface.…”

Modeling and Simulation of Janus-like Nanoparticles Formation by Solid-Gas Exothermic Reactions

“…A number of works have shown the importance of dispersion terms in averaged equations along with molecular diffusion. Various models of thermal dispersion have been developed in [29][30][31][32][33][34][35]. While the molecular diffusion takes place in a lowing and stagnant media as well, the dispersion is strongly influenced by the hydrodynamic flow.…”

“…One of problems in sintering technology is to achieve the sufficiently low level of porosity. The Ti-TiAl 3 powder mixtures studied in [35,36] allowed one to simultaneously achieve acceptable values of the sintered cathode porosity and cost of their manufacture under experimental industrial conditions. In [35][36][37] the models of sintering and synthesis of solid phase powder mixtures are considered, accounting for the mutual influence of the processes of volumetric changes in the sintering process.…”

“…The Ti-TiAl 3 powder mixtures studied in [35,36] allowed one to simultaneously achieve acceptable values of the sintered cathode porosity and cost of their manufacture under experimental industrial conditions. In [35][36][37] the models of sintering and synthesis of solid phase powder mixtures are considered, accounting for the mutual influence of the processes of volumetric changes in the sintering process. Temperature and concentration gradients lead to a change in the volume and appearance of displacements and stresses in the solid phase.…”

“…The value ω = ω T + ω g + ω s is total coefficient of volumetric expansion where ω T is the value of thermal expansion and the values ω g , ω s are found using molar volumes occupied by gas and solid components [35][36][37] via the following relations ,…”