Hydrogen Permeation and Diffusion in Amorphous Alloy Ni_(68)Cr7_Si_8B_(14)Fe_3 at Elevated Temperature

The behaviour of hydrogen permeation and diffusion in amorphous alloy Ni68Cr7Si8B14Fe3 has been investigated by an ultrahigh vacuum gas permeation technique. A comparison experiment was carried out between the as-quenched and annealed states (400 degrees C/2h) of the amorphous alloy. The results show that, for both states of the amorphous alloy in the temperature range of 200 similar to 350 degrees C, the diffusivity and permeability of hydrogen are in agreement with Arrhenius relationship, there does not exist H-trapping effect, and the activation energies of diffusion and permeation almost keep the same.