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%e present results of the computer simulation of the time evolution of a model binary alloy following quenching. OUI' Inodel system 1s a simple cub1cal lattice the sltcs of which arc occup1cd either by A or 8 particles. There is a nearest-neighbor interaction favoring segregation into an A-rich and a 8-rich phase at low temperatures, T g T,. Starting from a random configuration, T= cc, the system is quenched to and evolves at a temperature (k~p) ' where the probability of an exchange between an A and 8 atom on nearest-neighbor sites is assumed proportional to e~(1+e~" ) '. 5 U is the change in energy resulting from the exchange, This depends on thc configuration of thc tcn s1tcs neighboring thc pair of sltcs on which thc cxchangc would take place. In the work reported here we used a 30&30&30 lattice with half the sites occupied by A particles. The system was quenched to temperatures T/T, ' = 0.6, 0.8, 0.9, and 1.1, Results are presented for the evolution of

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