Debye temperature of nanocrystalline Fe-Cr alloys obtained by mechanical alloying
Abstract
A series on nanocrystalline Fe100-xCrx alloys prepared by mechanical alloying was investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM) and M\"ossbauer spectroscopy (MS) techniques. XRD and SEM were used to structurally characterize the samples whereas MS permitted phase analysis as well as determination of the Debye temperature, ThetaD. Concerning the latter, an enhancement relative to bulk ThetaD-values was revealed in the range of ca. 40 < x <50. In a sample of Fe55.5Cr44.5 two phases were detected viz. (1) crystalline and magnetic with ThetaD=572(56) K and (2) amorphous and paramagnetic with ThetaD=405(26) K.
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