トリチウム用ゲッター材の開発指針

概要

論文の詳細を見る
Hydrogen getter materials, most of which are metals and alloys forming hydrides, are attractive for the establishment of safe handling techniques of a large amount of tritium for the research and development of thermonuclear fusion reactors. To develop materials suitable for tritium handling, it is indispensable to find some guiding rules to predict thermodynamic parameters determining the equilibrium pressure of tritium. From this viewpoint, we searched for the relations between the observed heat of hydride formation and physicochemical properties of metals and alloys for over 300 different data in about 100 systems. We found an empirical equation consisting of the electronegativeities of hydride formers. This equation could evaluate the heat of the hydride formation for not only metals but also alloys consisting of even three or more components with the standard deviation of about 4 kcal/mol (hydride). Although this equation is not quite accurate, especially for those having relatively small heat of hydride formation, it can be applied as a powerful guiding rule to design tritium getters with adequate thermodynamic parameters for tritium handling.
富山大学の論文