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Article
Analysis of nanocrystallization kinetics and crystal size distribution under limited growth approach
(Elsevier, 2012)
Two different simulation approaches have been used to describe nanocrystallization processes: a limited growth approach, which is an extension from instantaneous growth approximation, and an average soft impingement ...
Article
Extension of the Classical Theory of Crystallization to Non-isothermal Regimes: Application to Nanocrystallization Processes
(Elsevier, 2012)
The non-isothermal kinetics of primary crystallization processes is studied from numerically generated curves and their predictions have been tested in several nanocrystallization processes. Single processes and transformations ...
Article
Enhancement of the Magnetic Refrigerant Capacity in Partially Amorphous Fe 70Zr 30 Powders Obtained by Mechanical Alloying
(Elsevier, 2012)
After mechanical alloying Fe 70Zr 30 composition from pure starting powders, an amorphous phase with Curie temperature T C = 244 K and an intermetallic compound (that should be non-stoichiometric Zr-rich fcc Fe 2Zr phase) ...
Article
The magnetocaloric effect and critical behavior in amorphous Gd 60Co 40-xMn x alloys.
(AIP Publishing, 2012)
The amorphous alloys Gd60Co40−xMnx (x = 0, 5, 10, 15) were prepared by melt spinning. The Curie temperature,T c, increases monotonously with Mn addition, ranging from 198 K for x = 0 to 205 K for x = 15, while the maximum ...
Article
Influence of isochronal annealing on the microstructure and magnetic properties of Cu-free HITPERM Fe40.5Co40.5Nb7B12 alloy
(AIP Publishing, 2012-06-07)
Systematic study of the effect of isochronal annealing on the structure and magnetic properties of Cu-free HITPERM alloy (Fe40.5Co40.5Nb7B12) is described herein. Mo¨ssbauer spectroscopy (MS) and anomalous x-ray diffraction ...
Article
Magnetic Multilayers as a Way to Increase the Magnetic Field Responsiveness of Magnetocaloric Materials
(American Scientific Publishers, 2012)
The magnetocaloric response of Ni–Cu based multilayers has been studied with the aim of optimizing their magnetic field dependence. In contrast to the behavior of single phase materials, whose peak magnetic entropy change ...
Article
The effect of distributed exchange parameters on magnetocaloric refrigeration capacity in amorphous and nanocomposite materials
(AIP Publishing, 2012-02-17)
The temperature dependent magnetization of nanocomposite alloys has been fit with a modified Handrich-Kobe equation with an asymmetric exchange fluctuation parameter combined with the Arrott-Noakes equation. The two equations ...
Article
Changes on the nanostructure of cementitius calcium silicate hydrates (C-S-H) induced by aqueous carbonation
(Kluwer Academic Publishers, 2012)
The nanostructure of the main binding phase of the hydrated cements, the calcium silicate hydrates (C-S-H), and their structural changes due to aqueous carbonation have been characterized using TEM, nitrogen physisorption, ...
Article
High temperature x ray diffraction determination of the body-centered-cubic-face-centered-cubic transformation temperature in (Fe 70Ni 30) 88Zr 7B 4Cu 1 nanocomposites
(AIP Publishing, 2012-02-16)
In situ high-temperature x ray diffraction and magnetization measurements were performed on a melt-spun (Fe70Ni30)88Zr7B4Cu1 amorphous alloy to follow its structural evolution. At 728 K, a bcc-FeNi phase was observed as ...
Article
The magnetocaloric effect of partially crystalline Fe-B-Cr-Gd alloys.
(AIP Publishing, 2012)
The influence of annealing temperature and crystallization on the magnetocaloric effect (MCE) of Fe-B-Cr-Gd partially crystalline alloys was studied. Although the alloys exhibited dissimilar devitrification behavior, all ...