COMPUTER-SIMULATION OF THE TIME EVOLUTION OF A QUENCHED MODEL ALLOY IN THE NUCLEATION REGION

The time evolution of the structure function and of the cluster (or grain) distribution following quenching in a model binary alloy with a small concentration of minority atoms is obtained from computer simulations. The structure function S̄(k,t) obeys a simple scaling relation, S̄(k,t)=K-3F(kK) with K(t)t-a, a≅0.25, during the latter and larger part of the evolution. During the same period, the mean cluster size grows approximately linearly with time. © 1979 The American Physical Society.