Hydrogenation characteristics of ternary alloys containing Ti4Ni2X (X=O, N, C)

Ti2Ni-based alloys containing oxygen, nitrogen and carbon were investigated regarding their metallographic structures and hydrogenation characteristics. The alloy samples containing these non-metal elements had multi-phase structures composed of Ti4Ni2X, TiNi and TiX (X=O, N, C) phases. The ternary alloy samples reversibly absorbed and desorbed hydrogen under moderate conditions such as room temperature and atmospheric pressure. The hydrogenation properties of the alloy samples containing the non-metal elements were compared with those of the binary Ti2Ni compound.