The H permeation in the supercooled liquid state for Ni65Nb25Zr10, Ni60Nb20Zr20 and Ni55Nb15Zr30 metallic glasses was investigated in conjunction with the effect of H diffusion on H permeation. The H permeation of the Ni65Nb25Zr10 and Ni60Nb20Zr20 metallic glasses increased significantly by the transition from the glassy solid state to the supercooled liquid state. The temperature at which this significant increase in H permeation appeared was much lower than Tg and was in correspondence with the onset temperature of the endothermic reaction relating to the glass transition. Moreover, it was found that the H permeation in the glassy phase was larger than that in the corresponding crystalline one. The contribution of H diffusion and solution to permeation was considered in detail.

Hydrogen Permeation of Ni-Nb-Zr Metallic Glasses in a Supercooled Liquid State. S.Yamaura, S.Nakata, H.Kimura, A.Inoue: Materials Transactions, 2006, 47[12], 2991-6