Abstract
Multilayer diffusional growth experiments were performed on silver-zinc binary alloys at 400 °C.The growth of the different phase layers was evaluated in terms of alternative theories, which were demonstrated to be equivalent algebraically but complementary because they are expressed in terms of different experimental variables. Parabolic growth constants and integral values of the chemical diffusion coefficients over the widths of the phases were calculated. In all instances of diffusion-controlled growth, the diffusion coefficients were in excellent agreement with conventionally measured values. The γ phase (Ag5Zn8) exhibited nondiffusion-controlled growth kinetics. The influence of the theoretical assumptions of the narrow range of stoichiometry, equilibrium phase boundary compositions and constant molar volumes is discussed.
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Formerly Research Associate in the Metallurgical Engineering Department, The Ohio State University, Columbus
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Williams, D.S., Rapp, R.A. & Hirth, J.P. Multilayer diffusional growth in silver-zinc alloys. Metall Trans A 12, 639–652 (1981). https://doi.org/10.1007/BF02649739
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DOI: https://doi.org/10.1007/BF02649739