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On the influence of the cooling rate on the martensitic transformation of Ni–Mn–Sn Heusler alloys

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Kalbfleisch, Anne-Sophie [UCL] Matthews, Guillaume [UCL] Jacques, Pascal [UCL]

The present study deals with Ni–Mn–Sn compounds that present large magnetocaloric effect through a firstorder magnetostructural transition. The influence of the processing path on the martensitic transformation temperatures was scrutinized by calorimetric measurements. It is shown that the increase of the cooling rate from the annealing temperature brings about a decrease of the martensitic transformation temperatures. All transformation temperatures were also higher in the case of powdered samples compared to bulk samples. A small variation of the degree of atomic order was highlighted and could be linked to the observed phenomena.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2016
Language Anglais
Journal information "Scripta Materialia" - Vol. 114, p. 121-124 (2016)
Peer reviewed yes
Publisher Pergamon ((United Kingdom) Kidlington)
issn 1359-6462
e-issn 1872-8456
Publication status Publié
Affiliation UCL - SST/IMMC/IMAP - Materials and process engineering
Keywords Magnetocaloric ; Martensitic phase transformation ; Order-disorder phenomena ; Heusler phases ; Differential scanning calorimetry
Links
Bibliographic reference Kalbfleisch, Anne-Sophie ; Matthews, Guillaume ; Jacques, Pascal. On the influence of the cooling rate on the martensitic transformation of Ni–Mn–Sn Heusler alloys. In: Scripta Materialia, Vol. 114, p. 121-124 (2016)
Permanent URL http://hdl.handle.net/2078.1/168980