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The grain-boundary diffusion (GBD) of 59 Fe in pure and in Cr-, Fe- and Zr-doped Ni 3 Al alloys was studied at temperatures between 873 and 1273K using the serial sectioning method. The grain-boundary diffusivities P (P is a product of grain-boundary width δ, and the diffusion coefficient in the grain-boundary D b ) were obtained from the penetration profiles using both...
Tracer grain-boundary diffusion (GBD) of chromium Cr-51 in slightly hypostoichiometric (x Al < 25 at%) Ni 3 Al alloys containing several at. pct of Fe, Cr and Zr was studied using both serial sectioning and residual activity methods. Measurements of the product of the diffusion coefficient in grain boundary and the width of grain boundary, P, were carried out in the temperature...
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