Effects of different pressures on the isothermal-solidification process pure Al were studied by molecular dynamics (MD) simulation using embedded-atom method (EAM). was first subjected to a rapid-cooling process, and then it annealed under conditions. Mean first-passage times (MFPT) method, Johnson-Mehl-Avrami (JMA) law, X-ray diffraction (XRD) analysis used qualify solidification- kinetic proc...

Recently published data on the precipitation of Ni–Zn ferrite powders prepared by the hydrothermal method have been analysed in a manner consistent with Avrami theory. The results indicate that the value of the time exponent is due to the growth of spherical particles in a solution which becomes progressively depleted of reactants. The analysis also indicates that the process can be considered ...

Different kinetic models like the Avrami, Tobin and Urbanovici-Segal models have been applied for determining the isothermal crystallization kinetics of virgin poly(ethylene terephthalate) (PET) and PET/poly(methyl methacrylate) (PMMA) blends. The different compositions investigated were PET90/PMMA10, PET75/PMMA25 and PET50/PMMA50 [wt/wt%]. The experimental data was fitted using Solver, a non-l...

Melting and crystallization of poly(vinylidene fluoride) (PVDF) blended with polyamide 6 (PA6) has been studied by differential scanning calorimetry. The melting of PVDF and PA6 is observed over a small temperature range, i.e. 174 to 181°C and 220 to 230°C, respectively, over the whole blend composition. This observation indicates that PVDF and PA6 are immiscible and do not co-crystallize, alth...

The reaction kinetics for the formation of CuInSe2 thin films from a stacked bilayer precursor consisting of InSe and CuSe was studied by means of in situ high-temperature x-ray diffraction. In particular, the isothermal phase evolution of the glass/InSe/CuSe precursor was observed at different temperatures. The pathway produces a CuInSe2 diffusion barrier layer that also functions as a nucleat...

Isothermal solidification process of pure metal Al was studied by molecular dynamics (MD) simulation using EAM potential. The effects different cooling rates on the isothermal metallic were studied. first subjected to a rapid process, and then it annealing under conditions. mean first-passage times (MFPT) method Johnson-Mehl-Avrami (JMA) law used qualify kinetic processing, nucleation rate, cri...

The static recrystallization/grain growth kinetics of the AZ31 (Mg-3Al-1Zn, wt%) alloy were investigated employing Vickers microhardness and electron backscatter diffraction (EBSD) measurements. was subject to a hot-rolling for 70% thickness reduction then annealed at various temperatures (150°C, 250°C, 350°C) from 5 min 24 h. First, recrystallization analysed by means Johnson-Mehl-Avrami-Kolmo...

The morphological evolution of nanoscale precipitates in Al–Cu alloys is studied by integrating first-principles calculations, the mixed-space cluster expansion, and Monte Carlo simulations. Without a priori assumptions, we predict generic precipitate morphologies dominated by strain-induced long-range interactions: single atomic layers consisting of 100%Cu atoms along {100} planes of a face-ce...

A new cellular automaton (CA) model of abnormal grain growth (AGG) that considers anisotropic boundary energies was developed in this paper. The energy expressed based on two types grains, which correspond to components different crystallographic orientation textured materials. CA established by assigning and grain-growth-driven mechanisms four boundaries formed grains. kinds grains adopted the...