Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses. Isheim, D., Seidman, D., N., Perepezko, J., H., & Olson, G., B. Materials Science and Engineering A, 353(1-2):99-104, 2003.
Nanometer-scale solute clustering in aluminum-nickel-ytterbium metallic glasses [pdf]Paper  abstract   bibtex   
The transformation sequence of melt-spun Al-5.2at.% Ni-6.8at.% Yb is characterized by X-ray diffraction, differential scanning calorimetry (DSC), and atom-probe field-ion microscopy. An isochronal DSC thermogram detects three major exothermic transformation steps, with onset temperatures of 180, 292, and 327°C, respectively. Atom-probe analyses reveal the evolution of compositional inhomogeneities on an atomic scale. In addition to Ni-clusters present in the as-quenched alloy, Ni-Yb co-clusters form during isochronal heating to 188°C. Al-rich precipitates are detected after heating to 250°C, with the Ni and Ni-Yb clusters still present, constituting possible precursors of intermetallic phases formed during advanced transformation stages. © 2002 Elsevier Science B.V. All rights reserved.

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