ZrNi上のPd被覆膜の真空加熱による状態変化

DOI 機関リポジトリ 機関リポジトリ (HANDLE)

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  • Changes in the Chemical and Crystallographic States of Pd-overlay on ZrNi plate with Vacuum Heating

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説明

Pd coating on Zr-based alloys are effective in protecting the alloy surface from poisoning impurity gases. To evaluate the stability of this layer regarding heat cycles, changes in the Pd overlayer on ZrNi plates with vacuum heating were studied as a model system with X-ray photoelectron spectroscopy (XPS) and X-ray diffractometry (XRD). XPS measurements revealed that the Pd coating caused a significant reduction in contaminant oxygen and carbon from the surface. XRD measurements of the Pd overlayer suggested that the internal stress of the Pd layers was annealed out and Ni atoms were dissolved in the layer below 800℃. At higher temperatures, PdZr was formed with the surface having a change in its nature.

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