Equilibrium pressures of hydrogen and deuterium dissolved in titanium, zirconium and hafnium at low concentrations

Equilibrium pressures of hydrogen and deuterium over titanium (420-9700C), zirconium (480-9400C) and hafnium (445-6350C) were measured in the pressure range from 0.013 to 133 Pa. The pressure-composition relationship obeyed Sieverts' law and the Sieverts' constants in the Arrhenius equation were derived. At constant atomic fraction the equilibrium pressures of deuterium were found to be 1.1 to 1.4 times as high as those of hydrogen for all three metals over the temperature range examined. (orig.)