Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1606486 | Journal of Alloys and Compounds | 2016 | 6 Pages |
Abstract
Magnetic refrigerants are used as heat exchangers to provide rapid heat transfer between magnetocaloric materials and heat-transfer liquid. An important question is how to turn bulk magnetocaloric materials into porous structures with superior heat transfer properties and cooling performance. We discuss two methods for assembling Y2Fe17 rapidly quenched ribbons into heat exchangers of desired geometry - stacked 100 μm thick plates with 100 μm gaps: the first method consists in gluing rapidly quenched ribbons using thermoconductive epoxy; the second is sintering stacked ribbons at a temperature of 30 K below the melting point of the Y2Fe17 phase. These approaches are promising with regards to making near-net shaped magnetic refrigerants. We report on adiabatic temperature change ÎTad, magnetic entropy change ÎSm and thermal conductivity λ of rapidly quenched Y2Fe17 ribbons, obtained at different quenching rates. A direct correlation between the lattice parameters of the Y2Fe17, ÎTad and ÎSm in rapidly quenched samples is observed.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
D. Yu Karpenkov, K.P. Skokov, J. Liu, A. Yu Karpenkov, E.M. Semenova, E.L. Airiyan, Yu G. Pastushenkov, O. Gutfleisch,