Fine control of Curie temperature of magnetocaloric alloys La(Fe,Co,Si)13 using electrolytic hydriding

SCRIPTA MATERIALIA

卷:175

Article

Guo, Liya¹  Lovell, Edmund²  Tang, Qiwei¹  Boldrin, David C.²  Tang, Chiu C.³  Day, Sarah J.³  Cohen, Lesley F.²  Ryan, Mary P.¹ 

[1] Imperial Coll London, Dept Mat, London SW7 2AZ, England

[2] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[3] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England

关键词: Magnetocaloric effect;    Intermetallics;    Electrolytic hydriding;    Synchrotron radiation;   

DOI  :  10.1016/j.scriptamat.2019.08.017

来源: Elsevier

【 摘 要 】

This work demonstrates precision control of hydrogen content in La(Fe,Co,Si)(13) H-delta for the development of environmentally friendly magnetocaloric-based cooling technologies, using an electrolytic hydriding technique. We show the Curie temperature, a critical parameter which directly governs the temperature window of effective cooling, can be varied easily and reproducibly in 1K steps within the range 274K to 402K. Importantly, both partially (up to 10%) and fully hydrided compositions retain favorable entropy change values comparable to that of the base composition. Crucially, we show in these second-order phase transition compounds, partial hydriding is stable and not susceptible against phase separation. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

Free