EXAFS study of mechanically alloyed Ni-Ta powder.

Autor: Zschech, Ehrenfried, Novgorodov, Boris, Zbiral, Johannes, Jangg, Gerhard, Ullrich, Hans-Jürgen
Zdroj: Microchimica Acta; 1992, Vol. 107 Issue 3-6, p235-243, 9p
Abstrakt: Amorphous Ni-Ta was obtained by mechanically alloying pure crystalline powders of nickel and tantalum. Structural changes in the local atomic arrangement effected by the mechanical treatment were studied by X-ray scattering and EXAFS spectroscopy. Both X-ray scattering and EXAFS data represent the destruction of long-range order with increasing milling time, i.e., the crystalline-to-amorphous transition. In contrast to an EXAFS study on the Ni-Ti system, our analysis does not confirm the presence of chemical short-range order. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index