1. Magnetocaloric Properties of Melt-Extracted Medium Entropy Gd 33 Co 33 Al 34 Microfibers.
- Author
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Zhang, Ning, Shen, Hongxian, Luo, Lin, Liu, Jingshun, Zhao, Zijian, Zhang, Lunyong, Sun, Jianfei, and Phan, Manh-Huong
- Subjects
MAGNETIC entropy ,MAGNETOCALORIC effects ,CURIE temperature ,ENTROPY ,FIBERS - Abstract
In this paper, a new medium entropy alloy with nominal composition of Gd
33 Co33 Al34 was designed and fabricated into microfibers by a melt-extraction method. The microstructure, thermophysical parameters, and magnetocaloric properties of the obtained fibers were systematically analyzed. The results showed that the as-cast fibers show an amorphous matrix with embedded in situ nano crystals. The fibers show a good magnetocaloric effect with the maximum magnetic entropy change of ~6 J/kg·K for a field change of 5 T. Notably, the fibers show excellent cooling efficiencies with an RCP and RC of ~611.72 and ~487.38 J/kg, respectively. Though the as-cast fibers possess an amorphous/nanocrystal bi-phase structure, they still exhibit a second-order transition near a Curie temperature of ~96 K. Our findings provide a promising pathway towards developing new magnetocaloric materials with good magnetocaloric performances. [ABSTRACT FROM AUTHOR]- Published
- 2024
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