Elastocaloric effect in aged single crystals of Ni54Fe19Ga27 ferromagnetic shape memory alloy

doi:10.3390/met12081398

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Elastocaloric effect in aged single crystals of Ni54Fe19Ga27 ferromagnetic shape memory alloy	3 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/met12081398

#мартенситное превращение

#эластокалорический эффект

#дисперсные частицы

#монокристаллы

#ферромагнитные сплавы с памятью формы

Title: Elastocaloric effect in aged single crystals of Ni54Fe19Ga27 ferromagnetic shape memory alloy
Creator: Panchenko, Elena Yu.
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Yanushonite, Eleonora I.
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Eftifeeva, Anna S.
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Tokhmetova, Aida B.
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Kurlevskaya, Irina D.
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Tagiltsev, Anton I.
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Surikov, Nikita Yu.
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Timofeeva, Ekaterina E.
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Chumlyakov, Yuri I.
Date: 2022
DOI: 10.3390/met12081398
Description: In the present study, the effect of 0-phase dispersed particles on both the L21(B2)-10M/14ML10 martensitic transformations and the elastocaloric effect in aged Ni54Fe19Ga27 single crystals oriented along the [001]-direction was investigated. It was experimentally shown that aging strongly affects the elastocaloric properties of these crystals. The precipitation of semi-coherent 0-phase particles up to 500 nm in size in the crystals aged at 773 K for 1 h leads to a 1.4 times increase in the operating temperature range of the elastocaloric effect up to DTSE = 270 K as compared with the initial as-grown crystals (DTSE = 197 K). The adiabatic cooling values DTad are similar for the as-grown crystals DTad = 10.9 (0.5) K and crystals aged at 773 K DTad = 11.1 (0.5) K. The crystals containing temperature range of DTSE = 255 K with slightly smaller adiabatic cooling DTad below 9.7 (0.5) K. The aged [001]-oriented Ni54Fe19Ga27 single crystals demonstrate high cyclic stability: the number of cycles does not influence the adiabatic cooling values and parameters of loading/unloading curves regardless of the particle size. The ways to improve the elastocaloric cooling parameters and stability of the elastocaloric effect by means of dispersed particles in the NiFeGa ferromagnetic shape memory alloy were discussed.
-: В ст. ошибочно: Nikita S. Surikov