Mechanisms of Amorphization and Structural
and Dynamic Properties of Ni₈₀Zr₂₀ Metallic Glass

R. R. Nurgayanov and V. G. Chudinov

Physicotechnical Institute, Ural Division, Russian Academy of Sciences, ul. Kirova 132, Izhevsk, 426001 Russia

Received May 6, 1997

Abstract—The molecular dynamics method with pair potentials calculated in terms of the pseudopotential the-
ory is applied to simulate the rapid quenching of Ni₈₀Zr₂₀ amorphous alloy and to analyze its atomic structure
and lattice dynamics. The total and partial radial atomic distribution functions are calculated, and the nearest
interatomic distances and coordination numbers are determined. The velocity distributions and densities of
vibrational states are obtained for each type of atoms. It is found that the unconventional behavior of amorphous
alloys results from the violation of thermodynamic conditions of the canonicity due to the nanocrystalline inho-
mogeneities of composition.

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