Computer simulation of physicochemical processes in reactive powder materials

Leitsin, V. N.; Dmitrieva, M. A.; Kolmakova, T. V.; Kobral, I. V.

doi:10.1007/s11182-006-0244-0

Cited by 6 publications

(1 citation statement)

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“…It is combining the ideology and tools of solid state physics and mediums micromechanic with a structure. [1]. Local processes and materials characteristics are simulated based on the classical results.…”

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Computer simulation of low-temperature composites sintering processes for additive technologies

Tovpinets

Leytsin

Dmitrieva

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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The application of additive technologies in creation a medical simulator-trainer of the human head operating field L N Kashapov, N F Kashapov, R N Kashapov et al. Abstract. This is impact research of mixture raw components characteristics on the lowtemperature composites structure formation during the sintering process. The obtained results showed that the structure determination of initial compacts obtained after thermal destruction of the polymer binder lets quantify the concentrations of main components and the refractory crystalline product of thermal destruction. Accounting for the distribution of thermal destruction refractory product allows us to refine the forecast of thermal stresses in the matrix of sintered composite. The presented results can be considered as a basis for optimization of initial compositions of multilayer low-temperature composites obtained by additive technologies. IntroductionA relevant task is to research technological methods of sintering of multilayered low-temperature ceramic. Additive manufacturing technologies using these materials are distinguished by layer-bylayer material growth and subsequent sintering. The heterogeneity of particle sizes and the density of their packing during the formation of initial compacts are technological parameters of layers packing. And the formation of interlayer interfaces should be taken into account. The under study model structure of the initial compact should reflect the heterogeneity of concentrations and sizes of original powder components and pores in the consolidated layers and interlayer interfaces.The computer modeling approach is developed to study the determining factors of low-temperature composites structure formation with considering the hierarchy of rheological processes in powder bodies and modification of hierarchically organized structures. The physical mesomechanic approach was taken in this research. It is combining the ideology and tools of solid state physics and mediums micromechanic with a structure. [1]. Local processes and materials characteristics are simulated based on the classical results.The initial compact preparation regimes, low-temperature ceramics sintering, and the effect of structural-mechanical characteristics on residual strains in the sintered material are examined.The initial compact of low-temperature ceramics is formed layer by layer from a mixture of components with certain porosity. Material matrix is forming during the composite sintering by the low-melting mixture raw components in a temperature lower than its melting point. The effective characteristics of the sintered ceramics are determined by the macroscopic structure of the initial compact, components and pores distribution and concentrations inhomogeneity of the phase and fractional initial components composition.

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