Interaction of nitrided titanium with a hydrogen plasma

Modification of metallic surfaces such as oxidation and nitriding were suggested to enhance divertor efficiency. The present paper reports on a study of the stability of nitrided titanium in a hydrogen plasma and on the effect of a thin nitride layer on the hydrogen permeation. It is shown that nitrided titanium remains chemically stable in the hydrogen plasma. A layer of an interstitially built epsilon-Ti2N can reduce the hydrogen permeation through titanium by orders of magnitude. (orig.)