The diffusivity of H in the solid solutions was determined by using electrochemical methods at temperatures of between 273 and 360K (table 140). For Au contents of up to 10at%, the mobility of H in the metal lattice was essentially unaffected by the presence of Au. Thereafter, increases in mobility occurred with increasing Au content. The results were attributed to the effect of interstitial sites, adjacent to Au atoms, which were suggested to act as anti-traps.

M.Yoshihara, R.B.McLellan: Acta Metallurgica, 1982, 30[1], 251-5

 

 

 

Table 140

Parameters for H Diffusion in Pd-Au at 273 to 360K

 

Au (at%)

Do (cm2/s)

E (kJ/mol)

0

2.89 x 10-7

22.19

0.96

2.82 x 10-7

22.20

2.47

2.78 x 10-7

22.22

4.89

2.76 x 10-7

22.28

7.61

2.71 x 10-7

22.28

10.05

2.69 x 10-7

22.87

15.31

2.63 x 10-7

22.45

20.08

2.45 x 10-7

23.28

49.23

1.51 x 10-7

32.76