Kinetics of diffusion in the Nb- Al system

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OGURTANI T
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| 1972年 / 3卷 / 02期
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Diffusion kinetics were studied by varying the time and temperature (800 to 1300 C) of dipping solid columbium into molten aluminum. It was found by x- ray diffraction analysis that only the Al//3Cb phase forms at the surface of the columbium specimen and that the thickness of this layer for a given dip temperature varies parabolically with time. The activation energy and the pre- exponential factor of the diffusion parameter were found to be about 36. 5 kcal/mole and 2. 0 sq cm/sec, respectively.
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页码：421 / 425
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