Thermal analysis of Mn50Ni50−x(Sn, In)x Heusler shape memory alloys

Off-stoichiometry Heusler ribbons with nominal compositions of Mn 50 Ni 50−x (Sn, In) x ( x  = 6, 8 and 10 at.%) has been produced by melt spinning. Thermal and thermodynamic analyses have been performed by means of differential scanning calorimetry scans of the reversible martensitic structural tra...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2018-11, Vol.134 (2), p.1277-1284
Main Authors: Coll, R., Saurina, J., Escoda, L., Suñol, J. J.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Differential scanning calorimetry
Entropy
Inorganic Chemistry
Martensitic transformations
Measurement Science and Instrumentation
Melt spinning
Physical Chemistry
Polymer Sciences
Shape memory alloys
Stoichiometry
Tin
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Summary:Off-stoichiometry Heusler ribbons with nominal compositions of Mn 50 Ni 50−x (Sn, In) x ( x  = 6, 8 and 10 at.%) has been produced by melt spinning. Thermal and thermodynamic analyses have been performed by means of differential scanning calorimetry scans of the reversible martensitic structural transformation. The transformation temperatures decrease as increasing In or Sn content. The entropy increases with increasing Sn or In content. The dissipation term of entropy is lower than 0.02 in all samples. The martensitic transformation (from austenite to modulated monoclinic 14M martensitic phase) was detected in Mn 50 Ni 50−x Sn x ( x  = 6, 8 and 10 at.%) and Mn 50 Ni 50−x In x ( x  = 6 and 8 at.%) samples. The structural transformation was not detected in the alloy with 10 at.% of indium.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-7551-x