http://nova.newcastle.edu.au/vital/access/services/Feed ${session.getAttribute("locale")} 5 http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3274 Tracer diffusion by way of vacancies is investigated in B2 intermetallics AB by means of a kinetic equation approach. The model used is one with four intersub-lattice frequencies where each sub-lattice is treated as a random alloy. Coupling is achieved between the two types of cycles, i.e., with the vacancy starting on one sub- lattice and finishing on either sub-lattice and with a vacancy starting on the other sub-lattice and finishing on either sub-lattice. An expression for the tracer correlation factor is derived in terms of atom vacancy exchange frequencies and atomic concentrations. Results from this expression are compared with Monte Carlo calculations and also results from a previous Manning-type random alloy approach to the problem. 2010-04-27T05:25:52.767Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3275 In this paper Manning random alloy model has been extended to the binary nonstoichiometric intermetallic compound of the B2 structure. Two sub-lattices, that are dynamically independent in six-jump cycle (6JC) mechanism, are coupled together by taking into consideration the vacancy motion as a sequence of nearest neighbour jumps in random directions. The linear response expressions for the phenomenological transport coefficients are evaluated making use of the kinetic equation approach. The expressions for collective correlation factors are derived in terms of the equilibrium partial atomic concentrations and jump frequencies. Results are compared with Monte Carlo simulation results using the four-frequency model. 2010-04-27T05:07:03.034Z ]]>