Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5460858 | Journal of Alloys and Compounds | 2017 | 8 Pages |
Abstract
The properties related to magnetocaloric effect (MCE) of annealed Ni50Mn18Cu7Ga25 ribbons were studied in connection with their microstructural features and magnetostructural transformations. The differences in magnetic entropy change between the reverse and direct austenite-to-martensite transformation processes lie in the magnetic field induced martensitic transformation. It occurs uniquely during the direct transformation but not reciprocal in the reverse transformation, which results in the relatively lower value of maximum ÎSM but higher δTFWHM of the ÎSM curve for the direct transformation (ÎSM = 17.8 Jkgâ1Kâ1, δTFWHM = 6 K) with respect to those of the reverse transformation (ÎSM = â32.1 Jkgâ1Kâ1, δTFWHM = 3 K) under magnetic field change μoÎH of 5 T. These transformation singularities have a deep connection with the microstructural configurations of the parent and product phases. The present study provides fundamental information necessary to understand the transformation dependent MCE of ferromagnetic functional alloys.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Naifu Zou, Zongbin Li, Yudong Zhang, C.F. Sánchez-Valdés, J.L. Sánchez Llamazares, Claude Esling, Bo Yang, Xiang Zhao, Liang Zuo,