Martensitic transformation, magnetic entropy, and adiabatic temperature changes in bulk and ribbon Ni48Mn39.5Sn12.5−xInx (x = 2, 4, 6) metamagnetic shape memory alloys
نویسندگان
چکیده
Abstract Martensitic transformation, magnetic entropy, and direct adiabatic temperature changes in Ni 48 Mn 39.5 Sn 12.5− x In ( = 2, 4, 6) metamagnetic Heusler bulk grain-constrained ribbon alloys were studied. All showed a typical L2 1 structure austenite the 4O martensite. Their relative volume contributions changed depending on content. With increasing concentration, martensitic transformation increased, whereas Curie of decreased. The entropy change under field 5 T attained maximum 20 J/kgK 14.4 with 8.5 4 nominal composition. corresponding 1.7 yielded 1.3 K for alloy. Despite grain confinement, melt spinning was found to stabilize martensite phase. Changes observed discussed relation strengthened covalency imposed by substitution. Graphic abstract
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1Department Materials Science and Engineering, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan 2Low Temperature Center, Osaka University, Toyonaka 560-8531, Japan 3Research Center for Materials and Science at Extreme Conditions, Osaka University, Toyonaka 560-8531, Japan 4Department of Applied Chemistry, Graduate School of Engineering, University of Tokyo, Tokyo 113-8656...
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ژورنال
عنوان ژورنال: Journal of Materials Research
سال: 2021
ISSN: ['0884-1616', '1092-8928', '0884-2914', '1091-8876', '2044-5326']
DOI: https://doi.org/10.1557/s43578-021-00335-x