Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session
MM 18.10: Poster
Montag, 31. März 2014, 18:00–20:00, P4
Pathway to mechanically stable magnetocaloric cycling materials — •Alexander Funk1,3, Anja Waske1, Maria Krautz2, Bruno Weise1,3, Konstantin Skokov4, and Jürgen Eckert1 — 1Institute for Complex Materials, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 2Institute for Metallic Materials, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 3Institute for Material Science, TU Dresden, Helmholtzstraße 7, 01069 Dresden, Germany — 4Material Science, TU Darmstadt, Petersenstraße 23, 64287 Darmstadt, Germany
Magnetocaloric materials could one day be the basis of a new magnetic cooling concept for consumer use, replacing conventional refrigeration technology. The research in magnetocalorics focused on the discovery and development of materials with large or giant magnetocaloric effects (MCE) over the last few decades. Such alloys [1, 2] show a 1st order phase transition, with a simultaneous structural and magnetic change. Therefore bulk MCE-materials often show mechanical instability during magnetic field cycling. Here, we present an approach to produce high quality MCE-materials which overcomes these problems. Results on magnetocaloric properties were obtained by magnetometry and direct ΔTad measurements. The materials structure and mechanical stability after cycling (e.g. crack development) were observed by X-Ray computed tomography and SEM.
References:
[1] V.K. Pecharsky et al., Phys. Rev. Lett. 78, 4494 (1997)
[2] D.T. Cam Thanh et al., J. Appl. Phys. 99, 08Q107 (2006)