The permeation of D in the alloy was studied by using the gas-phase breakthrough technique, at 100 to 500C, under pressures of between 10Pa and

100Pa. The diffusivity could be described by:

D (cm2/s) = 2.57 x 10-3 exp[-0.45(eV)/kT]

D.J.Mitchell, E.M.Edge: Journal of Applied Physics, 1985, 57[12], 5226-35