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Artículo
Ball Milling of Fe83Zr6B10Cu1 Amorphous Alloy Containing Quenched in Crystals
(Elsevier, 2007)
A Fe83B10Zr6Cu1 melt-spun amorphous alloy has been ball milled in the presence of partially crystalline ribbon pieces, in order to speed up its mechanical nanocrystallization process. Microstructure and magnetic properties ...
Artículo
A Direct Extension of the Avrami Equation to Describe the Non-isothermal Crystallization of Al-base Alloys
(Elsevier, 2007)
A direct extension of the Avrami equation considering the temperature dependence of the frequency factor is applied to describe the crystallization of a series of Al-Mm-Ni-Co amorphous alloys (Mm is a mischmetal). For high ...
Artículo
Mean magnetic moment of polydisperse superparamagnetic nanoparticles: Correlation between grain size and magnetic moment distributions
(American Scientific Publishers, 2007)
The field dependence of magnetization in superparamagnetic systems can be fitted using a set of Langevin contributions characterized by their particle densities and their magnetic moments. In fact, these contributions are ...
Artículo
Specific Heat Measurements on Amorphous and Nanocrystalline Al88Y5Ni5Co2
(Elsevier, 2009)
Specific heat at constant pressure, CP, was measured on amorphous and nanocrystalline Al88Y5Ni5Co2 alloys from differential scanning calorimetry experiments. Linear behavior of CP versus temperature from 323 to 423 K is ...
Artículo
Magnetocaloric effect in Mn-containing Hitperm-type alloys.
(AIP Publishing, 2007)
The magnetocaloric effect of Fe60−xMnxCo18Nb6B16 x=0,2,4 is studied. Mn addition decreases the Curie temperature of the alloys but also reduces the peak entropy change and the refrigerant capacity of the material. The ...
Artículo
Tailoring of magnetocaloric response in nanostructured materials: Role of anisotropy
(2008-03-25)
The magnetocaloric response of an ensemble of oriented uniaxial magnetic objects, perpendicularly magne- tized to their easy axes, for temperatures close to the blocking temperature is calculated with the aim of demonstrating ...
Artículo
The magnetocaloric effect in materials with a second order phase transition: Are T C and T peak necessarily coincident?
(AIP Publishing, 2009)
Using the Arrott–Noakes equation of state it is shown that the Curie point TC and the temperature where the magnetic entropy change is maximum Tpeak coincide only in the mean field approximation, but the Heisenberg ...
Artículo
Magnetocaloric response of Fe75Nb10B15Fe75Nb10B15 powders partially amorphized by ball milling
(AIP Publishing, 2009)
The magnetocaloric response of mechanically alloyed Fe75Nb10B15 powders was studied for samples with different amorphous and nanocrystal volume fractions. Thermomagnetic properties scale following a 3 law for different ...
Artículo
Crystallization behavior and magnetic properties of Cu-containing Fe- Cr- Mo- Ga- P- C- B alloys
(2006)
Multicomponent Fe65.5Cr4Mo4Ga4P12C5B5.5 amorphous alloy is known to have good soft magnetic properties combined with large glass-forming ability. Searching for a nanocrystalline structure that could improve its magnetic ...
Artículo
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 ...