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Metals 2015, 5(2), 695-705; doi:10.3390/met5020695

Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys

Department of Physics, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Kurt R. Ziebeck
Received: 1 March 2015 / Revised: 20 April 2015 / Accepted: 24 April 2015 / Published: 28 April 2015
(This article belongs to the Special Issue Shape Memory Alloys 2014)
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Abstract

Thermal and structural austenite to martensite reversible transition was studied in melt spun ribbons of Ni50Mn40Sn5Co5, Ni50Mn37.5Sn7.5Co5 and Ni50Mn35Sn10Co5 (at. %) alloys. Analysis of X-ray diffraction patterns confirms that all alloys have martensitic structure at room temperature: four layered orthorhombic 4O for Ni50Mn40Sn5Co5, four layered orthorhombic 4O and seven-layered monoclinic 14M for Ni50Mn37.5Sn7.5Co5 and seven-layered monoclinic 14M for Ni50Mn35Sn5Co5. Analysis of differential scanning calorimetry scans shows that higher enthalpy and entropy changes are obtained for alloy Ni50Mn37.5Sn7.5Co5, whereas transition temperatures increases as increasing valence electron density. View Full-Text
Keywords: magnetic shape memory; martensitic transformation; DSC; XRD; Ni-Mn-Sn-Co magnetic shape memory; martensitic transformation; DSC; XRD; Ni-Mn-Sn-Co
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Deltell, A.; Escoda, L.; Saurina, J.; Suñol, J.J. Martensitic Transformation in Ni-Mn-Sn-Co Heusler Alloys. Metals 2015, 5, 695-705.

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