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KR: Fachverband Kristallographie

KR 10: Poster: Multiferroics (with MA, DF, KR, DS)

KR 10.62: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

In vitro study of iron-palladium ferromagnetic shape-memory alloy in simulated body fluid (SBF) — •Yanhong Ma, Florian Szillat, and Stefan G. Mayr — Leibniz-Institut fuer Oberflaechenmodifizierung, Translationszentrum fuer regenerative Medizin und Fakultaet fuer Physik und Geowissenschaften der Universitaet Leipzig, Permoserstrasse 15, 04318 Leipzig

Ferromagnetic shape memory alloys are a special class of active materials. They exhibit large actuation strain in martensitic phase due to a magnetic field induced reorientation of twin variants. For their biomedical applications, the biocompatibility is very important, as e.g. indicated by simulated body fluid (SBF) test. In the present study we focus on biocompatibility of Fe₇₀Pd₃₀ thin films. The surface morphologies and composition of the samples were studied by scanning electron microscopy equipped with energy dispersive X-ray spectroscopy. Analysis of the thin films crystalline structure was performed by X-ray diffraction. The elemental concentrations in SBF were measured after the samples were removed, using inductively coupled plasma optical emission spectroscopy. SBF experiments show that when the samples were immersed into the solution for 48 hours, some changes on the elemental concentration in SBF occurred. The Fe concentration in the as prepared SBF was about 0.002 mg/ml and no Pd was detected. After the sample was soaked into the solution for two days, concentrations of 0.028 mg/ml(Fe) and <0.001 mg/ml (Pd), respectively, were determined. This indicates, that some Fe moved into the solution from the film while the concentration of Pd did not change during the test.