Kinetics of an Order-Disorder Transition

Novel computer simulations are described of the time evolution of an ordering model binary alloy following quenching from a disordered state at a high temperature. The results are interpreted with use of ideas of Lifshitz and of Cahn and Allen; the ordering process is described by a kinetic equation for the motion of the walls separating domains with different orderings. The characteristic length increases as $t^{\frac{1}{2}}$, and the structure function scales as $k{t}^{\frac{1}{2}}$.