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Mostrando ítems 21-30 de 39
Artículo
Nanocrystalline Fe-Nb-(B,Ge) alloys from ball milling: microstructure, thermal stability and magnetic properties
(Elsevier, 2007)
Fe75B20Nb5, Fe75Ge10B10Nb5 and Fe75Ge20Nb5 alloys were prepared by ball milling from pure powders and their microstructure and magnetic properties were studied. A nanocrystalline solid solution of-Fe type is the main ...
Artículo
Instantaneous growth approximation describing the nanocrystallization process of amorphous alloys: A cellular automata model
(Elsevier, 2008-07)
A cellular automata simulation based on an instantaneous growth approximation is developed to model the nanocrystallization kinetics. In this frame, the time required for a nucleus to grow up to its maximum size is ...
Artículo
The magnetocaloric effect in soft magnetic amorphous alloys
(2007)
The influence of different compositional modifications on the magnetic entropy change and refrigerant capacity of Finemet, Nanoperm, HiTperm, and bulk amorphous alloys is presented. For all the studied alloys, the field ...
Artículo
Magnetic permeability of ( Fe Co Ge ) 88 Zr 6 B 5 Cu 1 alloys: Thermal stability in a wide temperature range.
(AIP Publishing, 2008)
Temperature dependence, from room temperature up to 1000 K, of the initial permeability of Fe83−xCoxGe5Zr6B5Cu1 x=5 and 20 alloys at different stages of devitrification is reported. As nanocrystallization progresses, ...
Artículo
Relationship between coercivity and magnetic moment of superparamagnetic particles with dipolar interaction
(2005-11-22)
The temperature dependence of the hysteresis loops of Nanoperm-type alloys has been studied. In the high-temperature region above the coercivity maximum, the response of the system can be modeled as that of dipolar-interaction ...
Artículo
The influence of Co addition on the magnetocaloric effect of Nanoperm-type amorphous alloys
(AIP Publishing, 2006-09-22)
The effect of Co addition on the magnetocaloric effect of amorphous alloys with Nanoperm-type composition has been studied for temperatures above room temperature. Co addition produces an increase in the maximum magnetic ...
Artículo
Joule heating as a technique for obtaining uncoupled soft and hard magnetic phases in a Finemet alloy
(AIP Publishing, 2007)
A detailed study on the microstructural evolution of the Fe73.9Cu0.9Nb3.1Si13.2B8.9 Finemet alloy upon Joule heating and its correlation with the magnetic properties is reported. Mössbauer spectroscopy suggests the ...
Artículo
Influence of Ge addition on the magnetocaloric effect of a Co-containing Nanopermtype alloy.
(AIP Publishing, 2008)
The influence of the partial substitution of B by Ge on the magnetocaloric response of Fe78Co5Zr6B10Cu1 is studied. Ge addition produces a reduction in the temperature at which the peak entropy change takes place, as ...
Artículo
Enhanced magnetocaloric response in Cr/Mo containing Nanoperm-type amorphous alloys
(AIP Publishing, 2007-02-01)
The magnetocaloric effect of Fe76Cr8−xMoxCu1B15 (x =0,4) alloys is studied. Although the combined addition of Cr and Mo is more efficient in tuning the Curie temperature of the alloy, the Mo-free alloy presents a higher ...