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Microstructural and magnetic behavior of an equiatomic NiCoAlFe alloy prepared by mechanical alloying
JOSE MARTIN HERRERA RAMIREZ
ROBERTO MARTINEZ SANCHEZ
IVANOVICH ESTRADA GUEL
JOSE ANDRES MATUTES AQUINO
Acceso Abierto
Atribución-NoComercial
https://doi.org/10.1016/j.jallcom.2014.01.233
Equiatomic NiCoAlFe powder alloys were synthesized by mechanical alloying. The microstructural evolution of the mechanically alloyed powders at different times was followed with X-ray diffraction and scanning electron microscopy. The as-mechanically alloyed powders were subjected to a rapid annealing treatment at 1273 K and 1473 K during 3 min in vacuum. X-ray diffraction studies show the structure of both, the as-mechanically alloyed and annealed powders, consisted in a mixture of nanocrystalline simple phases (FCC + BCC). Crystallite size, after annealing, still remained in nanoscale. Coercivity increased due to the decrease in crystallite size and because of the defects caused by mechanical alloying in the as-mechanically alloyed samples; then coercivity decreased due to the phenomenon of random magnetic anisotropy and tended to stabilize with longer alloying times. A similar behavior was observed in annealed samples at 1273 K. However, random magnetic anisotropy was not observed after annealing at 1473 K because crystals with larger sizes were produced, and a steady increase in coercivity was observed.
2014
Artículo
Inglés
Gómez-Esparza, C. D., Baldenebro-López, F. J., Santillán-Rodríguez, C. R., Estrada-Guel, I., Matutes-Aquino, J. A., Herrera-Ramírez, J. M., & Martínez-Sánchez, R. (2014). Microstructural and magnetic behavior of an equiatomic NiCoAlFe alloy prepared by mechanical alloying. Journal of Alloys and Compounds, 615, S317-S323.
BIOLOGÍA Y QUÍMICA
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