Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites

Sellschopp K, Weise B, Krautz M, Cugini F, Solzi M, Helmich L, Hütten A, Waske A (2018)
ENERGY TECHNOLOGY 6(8): 1448-1452.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Magnetocaloric composites made from La-Fe-Co-Si particles and an epoxy binder matrix exhibit mechanical stability and good magnetocaloric properties, but also a large characteristic time for thermal transport. Here, the origin of this large time constant is examined by comparing two measurement techniques, direct and contactless, to finite-element simulations based on a tomographic dataset of the sample. The combination of the low thermal conductivity of the epoxy matrix and a thermal resistance at the interface between epoxy and La-Fe-Co-Si is shown to be in good agreement in simulations and experiments. The findings help to disentangle the role of the thermal conductivity and the interfacial thermal resistance for the heat flow in magnetocaloric composites. It is shown that the low thermal conductivity of the epoxy alone cannot explain the large time constant and possibilities for using the interfacial thermal resistance to tailor anisotropic thermal conductivity for directional heat transfer in magnetocaloric composites are presented.
Stichworte
composite materials; interfacial thermal resistance; magnetocaloric; cooling; numerical simulations; X-ray tomography
Erscheinungsjahr
2018
Zeitschriftentitel
ENERGY TECHNOLOGY
Band
6
Ausgabe
8
Seite(n)
1448-1452
ISSN
2194-4288
eISSN
2194-4296
Page URI
https://pub.uni-bielefeld.de/record/2931121

Zitieren

Sellschopp K, Weise B, Krautz M, et al. Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites. ENERGY TECHNOLOGY. 2018;6(8):1448-1452.
Sellschopp, K., Weise, B., Krautz, M., Cugini, F., Solzi, M., Helmich, L., Hütten, A., et al. (2018). Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites. ENERGY TECHNOLOGY, 6(8), 1448-1452. doi:10.1002/ente.201800111
Sellschopp, K., Weise, B., Krautz, M., Cugini, F., Solzi, M., Helmich, L., Hütten, A., and Waske, A. (2018). Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites. ENERGY TECHNOLOGY 6, 1448-1452.
Sellschopp, K., et al., 2018. Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites. ENERGY TECHNOLOGY, 6(8), p 1448-1452.
K. Sellschopp, et al., “Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites”, ENERGY TECHNOLOGY, vol. 6, 2018, pp. 1448-1452.
Sellschopp, K., Weise, B., Krautz, M., Cugini, F., Solzi, M., Helmich, L., Hütten, A., Waske, A.: Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites. ENERGY TECHNOLOGY. 6, 1448-1452 (2018).
Sellschopp, Kai, Weise, Bruno, Krautz, Maria, Cugini, Francesco, Solzi, Massimo, Helmich, Lars, Hütten, Andreas, and Waske, Anja. “Interfacial Thermal Resistance in Magnetocaloric Epoxy-Bonded La-Fe-Co-Si Composites”. ENERGY TECHNOLOGY 6.8 (2018): 1448-1452.