The diffusivities and migration energies of H isotopes in these alloys (table 136) were determined by measuring the increase in electrical resistivity which was due to the ordering of the isotopes at about 50K.

Migration of Hydrogen Isotopes in Pd-Ag Dilute Alloys around 50K. K.Yamakawa, H.Maeta: Scripta Metallurgica et Materialia, 1993, 29[12], 1577-80

 

Table 139

Diffusion Parameters (423-523K) for H in Pd1-xAgx Alloys

 

x

Do (cm2/s)

E (kJ/molH)

0

4.8 x 10-3

23.7

0.10

3.6 x 10-3

23.6

0.15

3.5 x 10-3

23.7

0.19

3.6 x 10-3

23.8

0.23

2.8 x 10-3

23.5

0.30

3.5 x 10-3

24.5

0.35

4.4 x 10-3

27.3

0.40

3.8 x 10-3

29.0

0.45

1.6 x 10-3

30.7

0.50

3.8 x 10-3

33.5