Alloys were prepared by arc-melting in an Ar ambient which contained 10%D2. The desorption of D from alloys which contained between 0.009 and 0.092at%C, or between 0.006 and 0.092at%B, was studied by using a vacuum desorption method at 533 to 953K. It was found that the diffusivity could be described by:

D (cm2/s) = 1.65 x 10-1 exp[-14.3(kcal/mol)/RT]

The addition of C or B decreased the diffusivity. This was attributed to the trapping effects of carbides and borides, and the trap energy was deduced to be equal to 54kJ/mol.

T.Noda, M.Okada: Transactions of the Japan Institute of Metals, 1987, 28[6], 517-23