DIFFUSION OF HYDROGEN IN AMORPHOUS NICRFESIB ALLOY

The diffusion of hydrogen in amorphous NiCrFeSiB alloy has been studie d by electrochemical method. In the temperature range of 20 similar to 50 degrees C, diffusion coefficient of hydrogen in the alloy follows the equation: D(cm(2)/s) = 9.27x10(-8) exp(-53.4 kJ/RT). At room tempe rature the diffusion coefficient D and the solubility C-0 are 6.125 x 10(-12) cm(2)/s and 0.007 mol/cm(3), respectively. When As2O3 is added into the cathodic solution or the charging current density is increas ed, the diffusion coefficient and solubility increase, and the diffusi on activation energy decreases. The influence of amorphous structure o n diffusion and solution of hydrogen is discussed.