Martensitic transformation, magnetic entropy, and adiabatic temperature changes in bulk and ribbon Ni48Mn39.5Sn12.5-xInx (x=2, 4, 6) metamagnetic shape memory alloys

被引：5
|
作者：
Czaja, P. [1 ]
Przewoznik, J. [2 ]
Hawelek, L. [3 ]
Chrobak, A. [4 ]
Zackiewicz, P. [3 ]
Maziarz, W. [1 ]
机构：
[1] Polish Acad Sci, Aleksander Krupkowski Inst Met & Mat Sci, 25 Reymonta St, PL-30059 Krakow, Poland
[2] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Solid State Phys, Al Mickiewicza 30, PL-30059 Krakow, Poland
[3] Inst Nonferrous Met, Lukasiewicz Res Network, 5 Sowinskiego Str, PL-44100 Gliwice, Poland
[4] Univ Silesia, A Chelkowski Inst Phys, 4 Uniwersytecka Str, PL-40007 Katowice, Poland
来源：
JOURNAL OF MATERIALS RESEARCH | 2021年 / 36卷 / 16期
关键词：
Magnetic properties; Phase transformation; Rapid solidification; Shape memory; Transmission electron microscopy (TEM); X-ray diffraction (XRD); NI-MN-SN; MAGNETOCALORIC PROPERTIES; ROOM-TEMPERATURE; PHASE-TRANSITIONS; HEUSLER ALLOYS; AL; MICROSTRUCTURE; SUBSTITUTION;
D O I：
10.1557/s43578-021-00335-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Martensitic transformation, magnetic entropy, and direct adiabatic temperature changes in Ni48Mn39.5Sn12.5-xInx (x = 2, 4, 6) metamagnetic Heusler bulk and grain-constrained ribbon alloys were studied. All alloys showed a typical L2(1) structure in austenite and the 4O structure in martensite. Their relative volume contributions changed depending on In content. With increasing In concentration, the martensitic transformation temperature increased, whereas the Curie temperature of austenite decreased. The magnetic entropy change under magnetic field of 5 T attained maximum of 20 J/kgK in the bulk and 14.4 J/kgK in the ribbon alloys with the Ni48Mn39.5Sn8.5In4 nominal composition. The corresponding adiabatic temperature change under 1.7 T yielded 1.3 K for the Ni48Mn39.5Sn8.5In4 bulk alloy. Despite grain confinement, melt spinning was found to stabilize martensite phase. Changes observed were discussed with relation to strengthened covalency imposed by In substitution.
引用
收藏
页码：3317 / 3328
页数：12
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