TU Darmstadt / ULB / TUbiblio

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

Krautz, Maria ; Skokov, Konstantin ; Gottschall, Tino ; Teixeira, Cristiano S. ; Waske, Anja ; Liu, Jian ; Schultz, Ludwig ; Gutfleisch, Oliver (2014)
Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application.
In: Journal of Alloys and Compounds, 598
doi: 10.1016/j.jallcom.2014.02.015
Article, Bibliographie

Abstract

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.

Item Type: Article
Erschienen: 2014
Creators: Krautz, Maria ; Skokov, Konstantin ; Gottschall, Tino ; Teixeira, Cristiano S. ; Waske, Anja ; Liu, Jian ; Schultz, Ludwig ; Gutfleisch, Oliver
Type of entry: Bibliographie
Title: Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application
Language: English
Date: 15 June 2014
Publisher: Elsevier Science Publishing
Journal or Publication Title: Journal of Alloys and Compounds
Volume of the journal: 598
DOI: 10.1016/j.jallcom.2014.02.015
Abstract:

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.

Uncontrolled Keywords: Magnetocaloric, Transition metal, Interstitial alloys, Hydrogen absorption, Magnetic refrigeration
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: 31 Mar 2014 08:15
Last Modified: 31 Mar 2014 08:15
PPN:
Funders: Funding by BMBF within the VIP Program “Neuartige magnetokalorische Maschine für Kühl – und Heizanwendungen“ is gratefully acknowledged.
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details