Intercrystalline diffusion of 57Co in polycrystalline gold at the upper bound of traditional studies of intercrystalline diffusion

Diffusion of 57 Co in polycrystalline gold was investigated at a homologous temperature T≅ 0.5T m (673 K) using two methods. The traditional method of dividing the diffusion zone into layers and measuring layer concentrations on a single-channel spectrometer (equipped with a scintillation detector with a well) provided depth profiles. A new method of measuring coefficients of diffusion in the cores of crystallite conjugation regions (CCR) was used to determine D CCR . In this method, an X-ray spectrometer with a planar HPGe detector was used to measure the intensities of radiation emitted by the remaining portion of samples after removing each layer when measuring layer concentrations by the traditional layer-by-layer method. The new method made it possible to determine the absolute value of the coefficient of diffusion D CCR in the core of a CCR.