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Based on various kinds of diffusivities as well as the thermodynamic descriptions within the CALPHAD framework, the atomic mobilities of U, Ti, Nb and Mo are explored in this work with the DICTRA software. The mobility end-members are evaluated from the impurity diffusivities as well as the extrapolated interdiffusivities, while the interaction parameters for atomic mobilities are determined from...
CALPHAD kinetics has gained rapid development in recent years, due to its wide applications in engineering novel alloys. In order to simulate the diffusion problems of interest, high-quality atomic mobilities are indispensable. Based on the thermodynamic descriptions for the Mo–Ta, Mo–W, and Mo–Nb binary systems, the atomic mobilities for such alloys are inversely parameterized in this work, including...
The CALPHAD technique has been utilized to study the diffusion characteristics and atomic mobilities in fcc Au–Pt alloys, where the thermodynamics and kinetics descriptions are concurrently taken into consideration. For the investigated atomic mobilities, the end-members and interaction parameters are explored with the impurity diffusion coefficients, intrinsic diffusion coefficients and interdiffusion...
CALPHAD kinetics has evolved to be a well-established discipline, which allows complex non-equilibrium processes to be fully explored. Such a success relies on the use of Redlich–Kister polynomials to describe atomic mobilities, with the effect of temperature, composition, magnetic ordering and chemical ordering sufficiently taken into consideration. There is thus an increasing demand to construct...
Diffusion in Ag-based solders is a practical topic that has attracted world-wide attention. With the available experimental data in the literature, the atomic mobilities of Ag, Cd and Sn in fcc Ag–Cd and Ag–Sn alloys are critically explored in this work. The proposed atomic mobility parameters can reproduce a great majority of experimental data, including impurity diffusion coefficients, tracer diffusion...
Based on the CALPHAD technique, the atomic mobilities and diffusivities in fcc Fe–X (X=Ag, Au, Cu, Pd and Pt) alloys have been critically studied. The thermodynamic descriptions and various types of diffusivities are concurrently taken into consideration using the Dictra software. The obtained mobility end-members and interaction parameters enable a great majority of measured diffusion coefficients...
In order to assist the design of bcc Ti–Ta and Ta–W alloys, the atomic mobilities of Ti, Ta and W are studied critically with the DICTRA software (DIffusion Controlled TRAnsformation), based on the published thermodynamic description, self-diffusion coefficients, impurity diffusion coefficients, intrinsic diffusion coefficients and interdiffusion coefficients. Good agreement is obtained from the comprehensive...
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