Artículo
Study of Phases Evolution in High-coercive MnAl Powders Obtained Through Short Milling Time of Gas-atomized Particles
Autor/es | Law, Jia Yan
Rial, J. Villanueva, M. López, N. Camarero, J. Marshall, L. G. Blázquez Gámez, Javier Sebastián Borrego Moro, Josefa María Franco García, Victorino Conde Amiano, Alejandro Lewis, L. H. Bollero, A. |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2017 |
Fecha de depósito | 2023-12-21 |
Publicado en |
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Resumen | Gas-atomized Mn54Al46 particles constituted nominally of only ε- and γ2-phases, i.e. no content of the ferromagnetic L10-type τ-phase, have been used to study the evolution of phases during short time of high-energy milling ... Gas-atomized Mn54Al46 particles constituted nominally of only ε- and γ2-phases, i.e. no content of the ferromagnetic L10-type τ-phase, have been used to study the evolution of phases during short time of high-energy milling and subsequent annealing. Milling for 3 min is sufficient to begin formation of the τ-MnAl phase. A large coercivity of 4.9 kOe has been obtained in milled powder after annealing at 355 °C for 10 min. The large increase in coercivity, by comparison with the lower value of 1.8 kOe obtained for the starting material after the same annealing conditions, is attributed to the combined formation of the τ-MnAl and β-Mn phases and the creation of a very fine microstructure with grain sizes on the order of 20 nm. Correlation between morphology, microstructure and magnetic properties of the rapidly milled MnAl powders constitutes a technological advance to prepare highly coercive MnAl powders. |
Agencias financiadoras | United States Department of Energy (DOE) Ministerio de Economía y Competitividad (MINECO). España Comunidad Autónoma de Madrid |
Identificador del proyecto | AR0000188
MAT2014-56955-R PCIN-2015-126 MAT2013- 45165-P PEJ-2014 S2013/MIT-285 |
Cita | Law, J.Y., Rial, J., Villanueva, M., López, N., Camarero, J., Marshall, L.G.,...,Bollero, A. (2017). Study of Phases Evolution in High-coercive MnAl Powders Obtained Through Short Milling Time of Gas-atomized Particles. Journal of Alloys and Compounds, 712, 373-378. https://doi.org/10.1016/j.jallcom.2017.04.038. |
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