Strain gauges were used to measure H diffusivity (table 230) in the disordered α-phase, and the ordered ε- and β-phases, by exploiting the Gorsky effect. It was found that there was a discontinuity in the Arrhenius curves for the ordered alloys. This was attributed to the motion of domain boundaries and to rapid H diffusion along these boundaries.

K.Papathanassopoulos, T.Schober, H.Wenzl: Solid State Communications, 1984, 52[6], 575-7

 

Table 230

Diffusivity of H in TaH0.52

 

Phase

Diffusion

Temperature (K)

D (cm2/s)

β, ε

normal

22

5.5 x 10-6

β, ε

normal

32

6.4 x 10-6

β, ε

normal

46

8.1 x 10-6

β, ε

enhanced

22

1.35 x 10-5

β, ε

enhanced

32

1.60 x 10-5

β, ε

enhanced

46

2.05 x 10-5

α

normal

67

1.15 x 10-5

α

normal

78

1.35 x 10-5

α

normal

90

1.60 x 10-5