Kinetics of diffusion via divacancies in a concentrated random fcc alloy

The diffusion kinetics in a concentrated fee alloy are described by means o f divacancies. The model chosen is the random alloy model with bound divaca ncies. We show that for the fee structure the Manning formalism developed o riginally for monovacancies can be used intact to describe diffusion via di vacancies. Monte Carlo simulation results for both tracer and collective co rrelation factors are in good agreement with the results of the formalism f or a wide range of the component atom exchange frequencies with the divacan cy except for the slower-moving component.