Shao, Yanyan ; Liu, Jian ; Zhang, Mingxiao ; Yan, Aru ; Skokov, Konstantin P. ; Karpenkov, Dmitriy Yu ; Gutfleisch, Oliver (2017)
High-performance solid-state cooling materials: Balancing magnetocaloric and non-magnetic properties in dual phase La-Fe-Si.
In: Acta Materialia, 125
doi: 10.1016/j.actamat.2016.12.014
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
La(Fe,Si)13H-based materials are considered to be one of the most promising room-temperature magnetic refrigerants. The intrinsic brittleness and relatively low thermal conductivity in La-Fe-Si-H alloys, however, have severely hindered its preparation, shaping and application. To solve this long-standing problem, in this work we propose a novel approach to fabricate stable La-Fe-Si-H blocks and plates by adding extra α-Fe as a reinforcing phase to enhance mechanical integrity. Much better bending strength compared to that in the stoichiometric composition has been observed in our dual phase La-Fe-Si-H magnetic refrigerants. Such novel Fe-rich plates can be exposed to 105 magnetic field cycles without losing mechanical integrity. In addition, a large and reproducible ΔTad of 5.4 K in 1.93 T and a thermal conductivity of 6 W/mK at room temperature have been obtained.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Shao, Yanyan ; Liu, Jian ; Zhang, Mingxiao ; Yan, Aru ; Skokov, Konstantin P. ; Karpenkov, Dmitriy Yu ; Gutfleisch, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | High-performance solid-state cooling materials: Balancing magnetocaloric and non-magnetic properties in dual phase La-Fe-Si |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Februar 2017 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 125 |
| DOI: | 10.1016/j.actamat.2016.12.014 |
| Kurzbeschreibung (Abstract): | La(Fe,Si)13H-based materials are considered to be one of the most promising room-temperature magnetic refrigerants. The intrinsic brittleness and relatively low thermal conductivity in La-Fe-Si-H alloys, however, have severely hindered its preparation, shaping and application. To solve this long-standing problem, in this work we propose a novel approach to fabricate stable La-Fe-Si-H blocks and plates by adding extra α-Fe as a reinforcing phase to enhance mechanical integrity. Much better bending strength compared to that in the stoichiometric composition has been observed in our dual phase La-Fe-Si-H magnetic refrigerants. Such novel Fe-rich plates can be exposed to 105 magnetic field cycles without losing mechanical integrity. In addition, a large and reproducible ΔTad of 5.4 K in 1.93 T and a thermal conductivity of 6 W/mK at room temperature have been obtained. |
| Freie Schlagworte: | La-Fe-Si-H, Magnetocaloric effect, Adiabatic temperature Change, Thermal conductivity |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 17 Mär 2017 09:02 |
| Letzte Änderung: | 17 Mär 2017 09:02 |
| PPN: | |
| Sponsoren: | This work is supported by the National Natural Science Foundation of China (Grant No. 51371184 and 51531008) and Zhejiang Provincial Natural Science Foundation of China (Grant No. LR14E010001, LY16E010002, 2013TD08)., D. Yu. Karpenkov is grateful to the Grant in the framework of Increase Competitiveness Program of NUST MISiS (K4-2015-013)., O. Gutfleisch and K. Skokov want to thank DFG (Grant No. SPP 1599). |
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