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Kinetics of diffusion in the Nb-Al system

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Abstract

Diffusion kinetics were studied by varying the time and temperature (800° to 1300°C) of dipping solid niobium into molten aluminum. It was found by X-ray diffraction analysis that only the Al3Nb phase forms at the surface of the niobium specimen and that the thickness of this layer for a given dip temperature varies parabolically with time. The activation energy and the preexponential factor of the diffusion parameter, (δD) were found to be 36.5 ∓ 0.45 kcal per mole and 2.0 ∓ 0.34 sq cm per sec, respectively.

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  1. Metallurgical Engineering Department, Middle East Technical University, Ankara, Turkey

    T. Oğurtani (Professor)

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  1. T. Oğurtani
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Oğurtani, T. Kinetics of diffusion in the Nb-Al system. Metall Trans 3, 425–429 (1972). https://doi.org/10.1007/BF02642046

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  • DOI: https://doi.org/10.1007/BF02642046

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