Effect of high-energy ball-milling on the magnetostructural properties of a Ni45Co5Mn35Sn15 alloy
Fecha
2021Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
Impacto
|
10.1016/j.jallcom.2020.158350
Resumen
The effect of high-energy ball-milling on the magnetostructural properties of a Ni45Co5Mn35Sn15 alloy in austenitic phase at room temperature has been analyzed by neutron and high-resolution X-ray diffraction. The ball milling promotes a mechanically-induced martensitic transformation as well as the appearance of amorphous-like non-transforming regions, following a double stage; for short milling ...
[++]
The effect of high-energy ball-milling on the magnetostructural properties of a Ni45Co5Mn35Sn15 alloy in austenitic phase at room temperature has been analyzed by neutron and high-resolution X-ray diffraction. The ball milling promotes a mechanically-induced martensitic transformation as well as the appearance of amorphous-like non-transforming regions, following a double stage; for short milling times (below 30 min), a strong size reduction and martensite induction occur. On the opposite, for longer times, the increase of strains predominates and consequently a larger amount of non-transforming regions appears. The effect of the microstructural defects brought by milling (as dislocations) on both the enthalpy change at the martensitic transformation and the high field magnetization of the austenite has been quantitatively estimated and correlated to the internal strains. Contrary to what occurs in ternary Ni-Mn-Sn alloys, the mechanically-induced defects do not change the ferromagnetic coupling between Mn atoms, but just cause a net reduction on the magnetic moments. [--]
Materias
High-energy ball-milling,
Metamagnetic shape memory alloy,
Microstructural defects,
Neutron diffraction
Editor
Elsevier
Publicado en
Journal of Alloys and Compounds, 858 (2021) 158350
Departamento
Universidad Pública de Navarra. Departamento de Ciencias /
Nafarroako Unibertsitate Publikoa. Zientziak Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
This work has been carried out with the financial support of the Spanish Ministerio de Economía y Competitividad (Projects number MAT2015-65165-C2-R) Agencia Estatal de Investigación (AEI), Ministerio de Ciencia, Innovación y Universidades (Projects number RTI2018-094683-B-C54 (MCIU/AEI/FEDER, UE)), Navarra Government (Project number PC017-018 AMELEC) and Basque Government Grant No. IT-1005-16. PLR has received funding from la Caixa and Caja Navarra Foundations, under agreement LCF/PR/PR13/51080004 .