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Open AccessArticle

Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys

1
Laboratory of Inorganic Chemistry, UR 11ES73, Université de Sfax, Soukra Road km 3,5, BP 1171, 3018 Safx, Tunisia
2
Department of Physics, Universitat de Girona, Campus Montilivi s/n, 17003 Girona, Spain
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(10), 853; https://doi.org/10.3390/cryst10100853
Received: 29 July 2020 / Revised: 14 September 2020 / Accepted: 19 September 2020 / Published: 23 September 2020
(This article belongs to the Special Issue Heusler Alloys)
The structure and thermal behavior are key factors that influence the functional response of Ni–Mn–Sn alloys. The present study reports the production as well as the structure and thermal analysis of melt-spun (solidification rate: 40 ms−1) Ni50 Mn50−xSnx (x = 10, 11, 12 and 13 at.%) alloys. X-ray diffraction measurements were performed at room temperature. The austenite state has an L21 structure, whereas the structure of the martensite is 7M or 10M (depending on the Sn/Mn percentage). Furthermore, the structural martensitic transformation was detected by differential scanning calorimetry (DSC). As expected, upon increasing the Sn content, the characteristic temperatures also increase. The same tendency is detected in the thermodynamic parameters (entropy and enthalpy). The e/a control allows the development production of alloys with a transformation close to room temperature. View Full-Text
Keywords: Heusler alloys; martensitic transformation; DSC; XRD; rapid solidification Heusler alloys; martensitic transformation; DSC; XRD; rapid solidification
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MDPI and ACS Style

Ameur, R.; Chemingui, M.; Bachaga, T.; Escoda, L.; Khitouni, M.; Suñol, J.-J. Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys. Crystals 2020, 10, 853. https://doi.org/10.3390/cryst10100853

AMA Style

Ameur R, Chemingui M, Bachaga T, Escoda L, Khitouni M, Suñol J-J. Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys. Crystals. 2020; 10(10):853. https://doi.org/10.3390/cryst10100853

Chicago/Turabian Style

Ameur, Rim; Chemingui, Mahmoud; Bachaga, Tarek; Escoda, Lluisa; Khitouni, Mohamed; Suñol, Joan-Josep. 2020. "Martensitic Transformation and Crystalline Structure of Ni50Mn50−xSnx Melt-Spun Heusler Alloys" Crystals 10, no. 10: 853. https://doi.org/10.3390/cryst10100853

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