Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application

被引：113

作者：

Krautz, Maria ^{[1
,2
,4
]}

Skokov, Konstantin ^{[4
]}

Gottschall, Tino ^{[4
]}

Teixeira, Cristiano S. ^{[3
]}

Waske, Anja ^{[5
]}

Liu, Jian ^{[6
]}

Schultz, Ludwig ^{[1
,2
]}

Gutfleisch, Oliver ^{[4
,7
]}

机构：

[1] IFW Dresden, Inst Metall Mat, D-01171 Dresden, Germany

[2] Tech Univ Dresden, Inst Mat Sci, D-01069 Dresden, Germany

[3] Univ Fed Santa Catarina, Dept Mech Engn, BR-88040900 Florianopolis, SC, Brazil

[4] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[5] IFW Dresden, Inst Complex Mat, D-01171 Dresden, Germany

[6] Chinese Acad Sci, Key Lab Magnet Mat & Devices, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

[7] Fraunhofer IWKS, Project Grp Mat Cycles & Resource Strategy, D-63457 Hanau, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 598卷

关键词：

Magnetocaloric; Transition metal; Interstitial alloys; Hydrogen absorption; Magnetic refrigeration; MAGNETIC ENTROPY CHANGE; INTERMETALLIC COMPOUNDS; TRANSITION;

D O I：

10.1016/j.jallcom.2014.02.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fully hydrogenated Mn containing LaFeSi alloys provide long time stability of attractive magnetocaloric properties; issues of previously reported induced phase co-existence can be avoided. In this paper, two series LaFe11.8 xSi1.2Mnx and LaFe11.6 xSi1.4Mnx (x = 0, 0.1, 0.2, 0.3, 0.4), before and after hydrogenation are presented. In the non-hydrogenated parent samples, microstructural evolution and phase formation with increasing Mn content are studied. It is found that materials combination within the sample series can provide constant MCE over a large working temperature range. As a peculiarity, the hydrogenated compounds show a different dependence of the transition temperature as a function of Si content than the parent compounds. This behaviour is explained by comparing the amount of hydrogen incorporated in samples with different Si content. Moreover, an estimation for the maximum adiabatic temperature change and optimal magnetic field is given exemplarily for a non-hydrogenated and a hydrogenated compound. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：27 / 32

页数：6

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