Journal of Chemical Physics, Vol.113, No.22, 10272-10278, 2000
Kinetics of ordering for a ternary alloy in the pair approximation
The kinetics of ordering in the bcc ternary alloy is investigated by means of the micromaster equation method in the pair approximation. The time evolution of the long-range order and short-range order parameters are calculated. A transient ordered state results in distinct features, such as stepwise variation, overshooting effects, and peaks in the evolution to different equilibrium phases. It is found that the development of short-range order in the ordering stage of the transient ordered state is different from that in the equilibrium phase. Short-range order relaxes gradually in the ordering stage of the transient ordered state in contrast to the fast change of short-range order in the ordering stage of the equilibrium phase.