Abstract
The atomic structures of Zr 70 Ga 10 Ni 20 amorphous alloys exhibiting a wide supercooled liquid region have been studied by the anomalous X-ray scattering (AXS) method. The local atomic structures around Zr, Ga and Ni have been determined in the amorphous samples as-quenched and annealed in the supercooled liquid region so that the atomic structure in the supercooled liquid region was compared with the one in the as-quenched state. The structural analyses and differential scanning calorimetry (DSC) traces in the as-quenched and annealed samples indicate that a structural change in the environment for Zr due to annealing in the supercooled liquid region is closely related with the thermal stability in the present amorphous alloy. In the crystallized sample prepared by annealing the as-quenched amorphous alloy for a long time in a supercooled liquid region, the precipitated phases have been determined to be Zr 2 Ni and Zr 6 Ga 2 Ni by analyzing the energy-differential intensity profiles at Zr, Ga and Ni K absorption edges.
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