http://nova.newcastle.edu.au/vital/access/services/Feed ${session.getAttribute("locale")} 5 http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3497 In this paper, a comprehensive diffusion kinetics theory is formulated to describe seamlessly tracer and chemical diffusion in antistructurally disordered B2 intermetallics showing positive and negative deviations from stoichiometry. The theory is based around unit processes consisting of six-jump cycles that can be assisted by intrinsic and extrinsic antistructural atoms of either atomic species. The Ising alloy model is used to illustrate the formalism, but the formalism can be adapted to other models. Expressions are developed for the tracer diffusion coefficients, the phenomenological coefficients, the intrinsic diffusion coefficients, the interdiffusion coefficient and the various correlation factor components. Results for the tracer and collective correlation factors and the vacancy wind factor (in interdiffusion) are in excellent agreement with results from Monte Carlo computer simulations based around single vacancy jumps. 2010-04-27T05:30:39.311Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3241 In this paper we explore the behaviour of the vacancy-wind factor or Manning factor for chemical diffusion in antistructurally disordered intermetallics taking the B2 structure. The analytical formalism is based on generalized six-jump- cycles providing the vehicles for diffusion of both components. Comparison of the analytical results is made with results from Monte Carlo calculations based only on single vacancy jumps. Very good agreement is found at low temperatures/ high levels of order where it can be anticipated that six-jump-cycles dominate the diffusion process. In such circumstances, a first (rough) approximation, it would be reasonable to put the vacancy-wind factor/Manning factor equal to 0.5 rather than unity as is often done. 2010-04-27T05:23:40.011Z ]]>