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Abstract
We have carried out self-diffusion studies along grain boundaries in polycrystalline Pb specimen in the temperature range of 70–200 °C. Pb203 radioactive isotope (half life of 52.1 h) was used as a tracer, and precision microtome serial sectioning and high-efficiency gamma counting techniques were employed. The combined diffusion parameter δDb in Pb grain boundaries is expressed by the Arrhenius relation δDb=(6.1±0.9)×=10−9 exp(−0.46±0.01 eV/kT)(cm3/sec) .
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