Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 35: Liquid and Amorphous Metals II

MM 35.4: Vortrag

Mittwoch, 24. März 2010, 12:15–12:30, H5

Investigation of (Cu₆₀Co₄₀)_1−xZr_x Alloys for Glass Forming Ability and Phase Separation — •Björn Schwarz¹, Norbert Mattern¹, and Jürgen Eckert^1,2 — ¹IFW Dresden, Institute for Complex Materials, P.O. Box 270116, Helmholtzstrasse 20, D-01069 Dresden, Germany — ²TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany

CuZr as well as CoZr are well known metallic glass formers in a wide compositional range. Since the binary CuCo systems exhibits a metastable liquid-liquid miscibility gap, i. e. Cu and Co tend to separate from each other, the ternary Cu-Co-Zr system is a promising candidate to form phase separated glass-glass composites. In this work (Cu₆₀Co₄₀)_1−xZr_x metallic glasses down to relatively low Zr contents of x=32 could be prepared by melt spinning technique and the as quenched as well as several heat treated states were investigated by x-ray diffraction, dynamical scanning calorimetry, high-resolution transmission electron microscopy, (in-situ) small angle scattering, x-ray photoelectron spectroscopy and magnetization measurements in order to reveal if phase separation is present in the as quenched amorphous state or if it can be induced by thermal treatment.