EXAFS studies of intermediate crystallisation steps of amorphous Ni-Zr alloys
R Frahm; R Haensel; P Rabe; R Frahm; Hamburger Synchrotronstrahlungslabor, Deutsches Elektronen-Synchrotron, West Germany; R Haensel; Hamburger Synchrotronstrahlungslabor, Deutsches Elektronen-Synchrotron, West Germany; P Rabe; Hamburger Synchrotronstrahlungslabor, Deutsches Elektronen-Synchrotron, West Germany
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-02-27
Аннотация:
Metallic Ni-Zr glasses show characteristic exothermic processes during crystallisation as observed with differential scanning calorimetry (DSC). In the glassy alloy Ni<sub>36.5</sub>Zr<sub>63.5</sub>, after the first of the two exothermic reactions leading to complete crystallisation an intermediate amorphous stage is found. The X-ray absorption near-edge structure (XANES) and the extended X-ray absorption fine structure (EXAFS) of such an alloy are compared to those for the as-cast alloy and to those for an intermediate crystallisation step, an alloy with the nominal composition NiZr<sub>2</sub>.
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