TU Darmstadt / ULB / TUbiblio

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

Shao, Yanyan and Liu, Jian and Zhang, Mingxiao and Yan, Aru and Skokov, Konstantin P. and Karpenkov, Dmitriy Yu and Gutfleisch, Oliver (2017):
High-performance solid-state cooling materials: Balancing magnetocaloric and non-magnetic properties in dual phase La-Fe-Si.
In: Acta Materialia, Elsevier, pp. 506-512, 125, ISSN 13596454,
[Online-Edition: http://doi.org/10.1016/j.actamat.2016.12.014],
[Article]

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.

Item Type: Article
Erschienen: 2017
Creators: Shao, Yanyan and Liu, Jian and Zhang, Mingxiao and Yan, Aru and Skokov, Konstantin P. and Karpenkov, Dmitriy Yu and Gutfleisch, Oliver
Title: High-performance solid-state cooling materials: Balancing magnetocaloric and non-magnetic properties in dual phase La-Fe-Si
Language: English
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.

Journal or Publication Title: Acta Materialia
Volume: 125
Publisher: Elsevier
Uncontrolled Keywords: La-Fe-Si-H, Magnetocaloric effect, Adiabatic temperature Change, Thermal conductivity
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 17 Mar 2017 09:02
Official URL: http://doi.org/10.1016/j.actamat.2016.12.014
Identification Number: doi:10.1016/j.actamat.2016.12.014
Funders: 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).
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item