Papers by Keyword: Grain Boundary Diffusivity

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Authors: S. Watanabe, Hidehiro Yoshida, Taketo Sakuma
Authors: Young Gee Na, Dong Yim Chang, Soon Chan Park, Kwang Seon Shin
Authors: Vĕra Rothová, Jiří Buršík, Milan Svoboda, Jiří Čermák
Abstract: Grain boundary self-diffusion in both the cast and the cold-rolled Puratronic 4N5 nickel was studied in the temperature range from 600 °C to 1000 °C. The experiments were carried out with the samples pre-annealed at 1100 °C in comparison to the samples pre-annealed at intended individual diffusion temperatures. The relative grain orientation was analyzed on the same samples by means of electron backscatter diffraction (EBSD) and grain boundaries (GBs) were characterized in terms of the coincidence site lattice (CSL) model. Considering the non-linear Arrhenius temperature dependencies obtained for most specimens by using conventional method of profile evaluation in the B-type kinetics and the appearance of two high-diffusivity paths in diffusion profiles measured, a more suitable BB-type and AB-type diffusion models were applied for data evaluation.
Authors: Yu.O. Bondarenko, N.F. Voronina, O.A. Shmatko
Abstract: Stages of cellular precipitation for the supersaturated Pb-Sn solid solutions were analyzed. This was done for almost the whole homogeneity interval. Literary heritage as well as the data of the present authors concerning kinetic and thermodynamic parameters of cellular precipitation for these solid solutions were compared and summarized. It was shown that the segregation factor, which characterizes the impurity atoms behavior at the grain boundary, decreases with solid solution supersaturation increase.
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