The diffusion of H (table 87) was monitored by using quasi-elastic neutron scattering, and measuring the width of the quasi-elastic line as a function of the scattering vector.

W.Gissler, G.Alefeld, T.Springer: Journal of the Physics and Chemistry of Solids, 1970, 31[10], 2361-9

 

Table 87

Diffusivity of Protons in Nb

 

H (at%)

Temperature (C)

D (cm2/s)

3.2

120

2.0 x 10-5

3.2

210

3.5 x 10-5

33

120

0.8 x 10-5

33

210

1.6 x 10-5

33

310

2.7 x 10-5

 

 

Table 88

Diffusivity of H into Polycrystallinea Nb

 

Temperature (C)

D (cm2/s)

200

4.1 x 10-7

250

1.1 x 10-6

300

2.2 x 10-6

600

5.9 x 10-5

650

7.2 x 10-5

700

9.2 x 10-5

a: grain-size = 0.26mm