Atomic Mechanisms of Amorphization in Transition
MetalMetalloid and MetalMetal Alloys

R. R. Nurgayanov and V. G. Chudinov

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

Abstract—The atomic structure and short-range order are studied by computer simulation method for a num-
ber of transition metal–metalloid and metal–metal amorphized alloys upon ultrafast quenching. The results
obtained make it possible to examine the atomic rearrangement in the course of transition to the disordered
(amorphous) state. Using the Ni₈₀B₂₀, Zr₈₀Be₂₀, and Ni₈₀Zr₂₀ alloys as examples, it is revealed that the amor-
phization of both the transition metal–metalloid and metal–metal alloys occurs through the mechanism of the
formation of low-dimensional nanometric dendrite-like compounds that nucleate in the liquid phase, persist
upon glass transition, disturb the order in a metal matrix, and, thus, prevent the transition to the crystalline state.

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