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Scattering of Conductivity Electrons on Grain Boundaries in Metals

The scattering of conduction electrons at grain boundaries in polycrystalline copper, molybdenum, and iron is studied. Linear functions of the specific electrical resistance versus concentration of grain boundaries are determined. Coefficients of conduction electron scattering kGB at grain boundaries as well as the specific electrical resistance of a single crystal are also determined for these metals. Additionally, the mean free path, lo, and the reflection coefficient, R, for conduction electrons are assessed from the internal size effect in the temperature range from 80 to 300 K.