Krautz, Maria and Skokov, Konstantin and Gottschall, Tino and Teixeira, Cristiano S. and Waske, Anja and Liu, Jian and Schultz, Ludwig and 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, pp. 27-32. Elsevier Science Publishing, ISSN 09258388,
[Article]
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 and Skokov, Konstantin and Gottschall, Tino and Teixeira, Cristiano S. and Waske, Anja and Liu, Jian and Schultz, Ludwig and Gutfleisch, Oliver |
| Title: | Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application |
| Language: | English |
| 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. |
| Journal or Publication Title: | Journal of Alloys and Compounds |
| Journal volume: | 598 |
| Publisher: | Elsevier Science Publishing |
| 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 |
| Official URL: | http://dx.doi.org/10.1016/j.jallcom.2014.02.015 |
| Identification Number: | doi:10.1016/j.jallcom.2014.02.015 |
| Funders: | Funding by BMBF within the VIP Program “Neuartige magnetokalorische Maschine für Kühl – und Heizanwendungen“ is gratefully acknowledged. |
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