XPSによるホットプレスベリリウムの表面分析

概要

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In the case of using hot-pressed beryllium in a fusion reactor, the surface state of hot-pressed beryllium is one of the items most necessary to investigate the behavior of hydrogen in beryllium. Therefore, the surface characterization of the hot-pressed beryllium was examined by X-rays photoelectron spectroscopy (XPS) after vacuum heating and deuterium ion bombardment. On the surface of the as-received sample, carbon, fluorine, oxygen and beryllium were observed. However, carbon that is sure to be adsorbed and fluorine that was mixed as an impurity during fabrication process decreased to a great extent by heating, and both elements (carbon and fluorine) were barely observed after heating at 800℃for 20 min. From the element-abundance-ratio of Be to O and ratio of the two peaks of Be 1s, it was obvious that surface of hot-pressed beryllium was covered by two parts of Be and one of BeO due to heating at 800℃ for 20 min. Additionally, it was observed that the oxidation of the surface of hot-pressed beryllium is induced by deuterium implantation using an ion gun.
富山大学の論文