The migration of D and H was measured by using a steady-state method. It was found that both isotopes moved towards the cooler end. The heat of transport was appreciably smaller for H than for D. The addition of Cr or Ti increased the heat of transport, whereas Fe or Mo did not greatly affect it (table 186).

Thermomigration of Hydrogen and Deuterium in Vanadium, its Alloys, Niobium and Tantalum. H.Nakajima, M.Yoshioka, M.Koiwa: Transactions of the Japan Institute of Metals, 1987, 28[12], 949-56

 

Table 185

Heat of Transport of H and D in Nb, Ta and V

 

Temperature (C)

Isotope

H (kJ/mol)

35

H

1.4

35

D

4.8

175

H

1.8

175

D

6.1