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- W1981309311 abstract "Grain boundary self-diffusion in Ni materials of two different purity levels (99.6 and 99.999 wt.%) was measured over wide temperature intervals using the radiotracer technique and applying the 63Ni radioisotope. The diffusion experiments were performed in both Harrison’s type B and type C kinetic regimes. The diffusional grain boundary width, δ, was found to be equal to 0.54 ± 0.1 nm, that is reasonably close to the accepted value of δ=0.5nm in face-centred cubic metals. The purer the material, the higher the grain boundary diffusivity and the lower the corresponding activation enthalpy of self-diffusion along general high-angle grain boundaries. Using the semi-empirical approach of Borisov et al., the average energy of high-angle grain boundaries was estimated to be about 0.79 and 0.98 J m−2 in the low- and high-purity Ni materials at room temperature, respectively." @default.
- W1981309311 created "2016-06-24" @default.
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- W1981309311 date "2010-01-01" @default.
- W1981309311 modified "2023-09-27" @default.
- W1981309311 title "Grain boundary self-diffusion in polycrystalline nickel of different purity levels" @default.
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- W1981309311 doi "https://doi.org/10.1016/j.actamat.2009.09.015" @default.
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