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Martensitic transformation in Mn-Ni-Sn Heusler alloys

Three magnetic shape memory alloys: Mn50Ni50-x Sn x (x = 5, 7.5, and 10) were produced as bulk polycrystalline ingots by arc melting. The structural austenite-martensite transformation was checked by calorimetry. The transformation temperatures decrease as increasing the Sn content. The same trend is found in the entropy and enthalpy changes related to the transformation. The control of the valence electron by atom e/a determines the transformation temperatures range in this kind of alloys and it is possible to develop alloys that can be candidates in applications as sensors and actuators. Furthermore, X-ray diffraction was performed to check the crystalline structure at room temperature

FICYT is acknowledged by J.L.S.LL (COF07-013). This study has been supported by the Spanish MEC under projects MAT2006-13925-C02-01 and MAT2006-13925-C02-02

© Journal of Thermal Analysis and Calorimetry, 2010, vol. 99, p. 905-909

Springer Verlag

Author: Coll, R.
Escoda i Acero, Ma. Lluïsa
Saurina i Canals, Joan
Sánchez Llamazares, José Luis
Hernando, Blanca
Suñol Martínez, Joan Josep
Date: 2010
Abstract: Three magnetic shape memory alloys: Mn50Ni50-x Sn x (x = 5, 7.5, and 10) were produced as bulk polycrystalline ingots by arc melting. The structural austenite-martensite transformation was checked by calorimetry. The transformation temperatures decrease as increasing the Sn content. The same trend is found in the entropy and enthalpy changes related to the transformation. The control of the valence electron by atom e/a determines the transformation temperatures range in this kind of alloys and it is possible to develop alloys that can be candidates in applications as sensors and actuators. Furthermore, X-ray diffraction was performed to check the crystalline structure at room temperature
FICYT is acknowledged by J.L.S.LL (COF07-013). This study has been supported by the Spanish MEC under projects MAT2006-13925-C02-01 and MAT2006-13925-C02-02
Format: application/pdf
ISSN: 1388-6150 (versió paper)
1588-2926 (versió electrònica)
Document access: http://hdl.handle.net/10256/12047
Language: eng
Publisher: Springer Verlag
Collection: MEC/PN 2006-2009/MAT2006-13925-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s10973-009-0489-2
Articles publicats (D-F)
Is part of: © Journal of Thermal Analysis and Calorimetry, 2010, vol. 99, p. 905-909
Rights: Tots els drets reservats
Subject: Aliatges
Alloys
Aliatges amb memòria de forma
Shape memory alloys
Anàlisi tèrmica
Thermal analysis
Transformacions martensítiques
Martensitic transformations
Title: Martensitic transformation in Mn-Ni-Sn Heusler alloys
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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