The migration of H in the alloy (tables 25 and 26) was investigated by using the time-lag technique. Annealing the alloy at 400C led to the establishment of short-range order, and resulted in a decrease in the activation energies for H permeation and diffusion (tables 27 and 28).

V.B.Vykhodets, V.A.Goltsov, P.V.Geld: Fizika Metallov i Metallovedenie, 1968, 26[5], 933-5

 

 

 

Table 25

Parameters for H Diffusion in Disordered Cu3Pd

 

Temperature (C)

Do (cm2/s)

E (kcal/g-atom)

300-410

1.80 x 10-3

8.50

480-700

2.80 x 10-3

9.65

 

 

 

Table 26

Parameters for H Permeation in Disordered Cu3Pd

 

Temperature (C)

Po (cm mm/s atm½)

E (kcal/g-atom)

300-410

1.06 x 10-2

7.77

480-700

2.15 x 10-2

8.30

 

 

 

Table 27

Parameters for H Diffusion in Ordered Cu3Pd at 300 to 400C

 

Annealing Time at 400C (h)

Do (cm2/s)

E (kcal/g-atom)

20

5.30 x 10-4

7.75

45

3.35 x 10-4

7.30

70

3.35 x 10-4

7.30

 

 

 

Table 28

Parameters for H Permeation through Ordered Cu3Pd at 300 to 400C

 

Annealing Time at 400C (h)

Po (cm mm/s atm½)

E (kcal/g-atom)

20

2.15 x 10-2

8.30

45

1.60 x 10-2

8.00

70

1.60 x 10-2

8.00