Structure and Stability of an Amorphous Metal

Details Structure and Stability of an Amorphous Metal Structure and Stability of an Amorphous Metal

1998-09-30

arxiv.org/abs/cond-mat/9809418v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 ps figs., to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.3159

Using molecular dynamics simulations, with a realistic many-body embedded-atom potential, and a novel method to characterize local order, we study the structure of pure nickel during the rapid quench of the liquid and in the resulting glass. In contrast with previous simulations with pair potentials, we find more crystalline order and fewer icosahedra for slower quenching rates, resulting in a glass less stable against crystallization. It is shown that there is not a specific amorphous structure, only the arrest of the transition from liquid to crystal, resulting in small crystalline clusters immersed in an amorphous matrix with the same structure of the liquid.

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