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High-performance solid-state cooling materials: Balancing magnetocaloric and non-magnetic properties in dual phase La-Fe-Si

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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