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- Title
Effect of Melt-Spinning Parameters on the Structure and Properties of Ni 55.5 Mn 18.8 Ga 24 Si 1.7 Heusler Alloy Ribbons.
- Authors
Bhale, Pranav; Ari-Gur, Pnina; Noebe, Ronald D.; Ren, Yang; Madiligama, Amila; Devaraj, Ranjith; Cook, Matthew S.
- Abstract
Ni–Mn-based Heusler alloys are known to demonstrate magnetic shape memory and giant magnetocaloric effect (MCE). These effects depend on the phases, crystallographic and magnetic phase transitions, and the crystallographic texture characteristics. These structural characteristics, in turn, are a function of the processing parameters. In the current work, Ni55.5Mn18.8Ga24Si1.7 Heusler alloy was processed by melt-spinning under a helium atmosphere. This process results in a fine microstructure. The ribbon that was produced with a narrower nozzle width, faster wheel speed, and higher cast temperature, indicating a faster cooling rate, had double the magnetic entropy change close to room temperature. However, the other ribbon demonstrated a large entropy change over a broader temperature range, extending its usability. The effect of the melt-spinning process parameters on the developing microstructure, crystallographic structure and texture, transformation temperatures, and the magnetic entropy change were studied to explain the difference in magnetocaloric behavior.
- Subjects
MAGNETIC entropy; MAGNETIC transitions; HEUSLER alloys; MAGNETOCALORIC effects; CRYSTAL texture; LOCKER rooms; RIBBONS
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 19, p6590
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16196590