Time Evolution of a Quenched Binary Alloy. II. Computer Simulation of a Three-Dimensional Model System.

摘要

Results of the computer simulation of the time evolution of a model binary alloy following quenching are presented. The model system is a simple cubical lattice, the sites of which are occupied either by A or B particles. There is a nearest-neighbor interaction favoring segregation into an A-rich and a B-rich phase at low temperatures. In the work reported here a 30 x 30 x 30 lattice with half the sites occupied by A particles is used. The system was quenched to temperatures T/T sub c = 0.6, 0.8, 0.9, and 1.1. Results are presented for the evolution of the Fourier transform of the spherically averaged structure function S(k,t) and of the energy. Comparison is made with various theories of this process and with some experiments.