Abstract
We used molecular dynamics ~MD! to obtain an atomistic description of the melting, glass formation, and crystallization processes in metal alloys. These studies use the quantum Sutton-Chen many-body potentials for Cu, Ni, and Ag to examine the Cu4Ag6 and CuNi alloys. Using cooling rates in the range of 2 310 12 to 4 310 14 K/s, we find that CuNi and pure Cu always form a face-centered-cubic ~fcc! crystal while Cu4Ag6 always forms a glass ~with Tg decreasing as the quench rate increases!. The crystal formers have radius ratios of 1.025 ~CuNi! and 1.00 ~Cu! while the glass former ~CuAg! has a ratio of 1.13, confirming the role of size mismatch in biasing toward glass formation. @S0163-1829~99!05205-4#
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