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On the use of classical JMAK crystallization kinetic theory to describe simultaneous processes leading to the formation of different phases in metals
(2015)
The classical theory of Johnson-Mehl-Avrami-Kolmogorov (JMAK) is widely used to describe the kinetics of crystallization even when the premises required for its application are not strictly fulfilled. In this paper we ...
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Cellular automata simulations on nanocrystallization processes: From instantaneous growth approximation to limited growth
(Elsevier, 2011-07)
Cellular automata simulations have been performed to simulate the crystallization process under a limited growth approximation. This approximation resembles several characteristics exhibited by nanocrystalline microstructures ...
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Influence of Mn content on the microstructure and hyperfine interaction parameters of amorphous and nanocrystalline Hitperm-type FeCoMnNbB alloys.
(Russian Academy of Sciences, 2008)
Effects of Mn addition on the devitrification kinetics, microstructure and hyperfine inter- action parameters of FeCoMnNbB alloys were investigated. As-cast and nanocrystalline samples were studied by different experimental ...
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Correlation between microstructure and temperature dependence of magnetic properties in Fe 60 Co 18 ( Nb , Zr ) 6 B 15 Cu 1 alloy series
(AIP Publishing, 2009-05-14)
Temperature dependence of magnetic properties of nanocrystalline Fe60Co18Cu1B15Nb6−xZrx (x =0, 3, 6) alloys has been studied at different stages of devitrification. Transmission electron microscopy shows nanocrystals of ...
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Thermal and Microstructural Dependence of the Initial Permeability of Co60Fe18Nb6(B,Cu)16 Alloys
(Elsevier, 2007)
The thermal and microstructural dependence of the initial permeability of Co60Fe18Nb6B16-yCuy (y = 0, 1) alloys have been studied. The comparison of kinetics and microstructural data of the two compositions indicate the ...
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Thermomagnetic detection of recrystallization in FeCoNbBCu nanocrystalline alloys
(AIP Publishing, 2001)
The recrystallization process in FeCoNbBCu nanocrystallinealloys is evidenced from thermomagnetic results as a significant decrease in magnetization at the second crystallization stage. The lowering in the volume fraction ...
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Non-Isothermal approach to isokinetic crystallization processes: application to the nanocrystallization of HITPERM alloys
(Elsevier, 2005)
A new approach is proposed for the study of crystallization processes under the hypothesis of isokinetic behavior. From a direct extension of the Avrami theory to non-isothermal regimes, an expression of the local Avrami ...
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Influence of Milling Time on the Homogeneity and Magnetism of a Fe70Zr30 Partially Amorphous Alloy: Distribution of Curie Temperatures
(MDPI, 2020)
In this work, the mechanically alloyed Fe70Zr30 (at. %) composition has been used to study the influence of milling time on its homogeneity and magnetic properties. The microstructure and Fe environment results show the ...
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Effects of high temperature treatments in air and argon on the magnetic properties of HITPERM alloys
(Elsevier, 2006)
The oxidation behavior of FeCo(NbZr)B(Cu) alloy series was studied. After heating up to 1073 K, an oxide layer View the MathML source∼1μm thick with a two-layer structure can be identified previous to a sharp interface ...
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On the use of JMAK theory to describe mechanical amorphization: a comparison between experiments, numerical solutions and simulations
(MDPI, 2018)
The kinetics of amorphization during ball milling is generally analyzed using two different approaches: the classical Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory and Delogu and Cocco’s model for which a region ...