Buscar
Mostrando ítems 1-10 de 21
Artículo
Thermal Arrest Analysis of the Reverse Martensitic Transformation in a Ni55Fe19Ga26 Heusler Alloy Obtained by Melt-spinning
(Springer Nature, 2023)
Ni55Fe19Ga26 ribbons obtained by melt-spinning technique exhibit a martensitic transformation from L21 cubic austenite phase to 14 M martensite phase above room temperature. We have taken advantage of the existence of ...
Artículo
On the order of magnetic transition in MnCo1−xFexGe (x = 0.20, 0.06 and 0.03) mechanical alloys
(Elsevier, 2023)
Mechanically amorphized MnCo1−xFexGe alloys (x = 0.20, 0.06 and 0.03) were used as precursors to obtain hexagonal austenite single phase samples. Combining thermomagnetic and magnetocaloric analysis and in situ X-ray ...
Artículo
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 ...
Artículo
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 ...
Artículo
Reversibility and Thermal Dependence of the Martensitic Transformation in a Melt-spun Ni55Fe17Ga26Co2 Heusler Alloy
(Elsevier, 2023)
An almost single phase 14 M modulated martensite is obtained in melt spun ribbon of Ni55Fe17Ga26Co2 Heusler alloy. The effect of thermal treatments on the stability of the reverse martensitic transformation from 14 M ...
Artículo
Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria
(MDPI, 2023-12)
Various stability criteria developed for high-entropy alloys are applied to compositions produced by mechanical alloying. While they agree with the annealed samples, these criteria fail to describe the as-milled metastable ...
Artículo
Evolution of Fe environments and phase composition during mechanical amorphization of Fe70Zr30 and Fe70Nb30 alloys
(Elsevier, 2018)
Amorphous Fe-Zr and Fe-Nb alloys with 70 at.% Fe have been prepared by ball milling a mixture of elemental powders. The combination of Mössbauer spectroscopy, X-ray diffraction, scanning electron microscopy and differential ...
Artículo
Extracting the composition of nanocrystals of mechanically alloyed systems using Mössbauer spectroscopy
(Elsevier, 2014)
Determining the composition at the nanoscale generally requires the use of experimental techniques such as 3D atom probe or nanoanalysis, which have limited availability, involve high economic cost and, moreover, imply ...
Artículo
Two Milling Time Regimes in the Evolution of Magnetic Anisotropy of Mechanically Alloyed Soft Magnetic Powders
(Elsevier, 2011)
The milling time evolution of magnetic anisotropy of ball milled powders can be described considering two regimes. First, for short milling times, the main factor affecting the magnetic behavior of the alloy is the ...
Artículo
Evolution of Fe environments in mechanically alloyed Fe–Nb–(B) compositions
(Elsevier, 2014)
Nanocrystalline alloys of nominal composition Fe85Nb5B10 were produced by mechanical alloying from a mixture of elemental powders. Two commercial boron structures were used: amorphous and crystalline. In addition, a third ...