Journal
JOURNAL OF APPLIED PHYSICS
Volume 114, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4816465
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Funding
- Leibniz Institute Pakt fur Forschung und Innovation program
- European Union
- Free State of Saxony
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Magnetic cooling prototypes based on the magnetocaloric effect require the magnetic refrigerant to be shaped into geometries that enable quick and efficient heat-transfer to the transfer fluid. Simple solutions include a stack of parallel-plates or a bed of packed-spheres. Here, we demonstrate how more sophisticated geometries can be made by using selective laser melting, a rapid prototyping technique to form three-dimensional shapes. Using excellent magnetocaloric La(Fe,Co,Si)(13) as starting-powder we made two geometries: a wavy-channel block with a high surface-to-volume ratio and an array of fin-shaped rods which eliminate unwanted heat conduction along the magnetic part. After annealing treatment, the geometries are intact and can survive more than 10(6) cycles of applying a magnetic field while still maintaining good magnetocaloric properties. This fabrication approach shows promise for making near-net shaped magnetic refrigerants with superior heat transfer properties and performance. (C) 2013 AIP Publishing LLC.
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