Data on diffusion in 3N85-purity Ni, and in alloys prepared from this Ni and 3N8-purity Fe, were reported. The results (table 121) showed that, in every case, a break in the Arrhenius plot occurred at the Curie temperature. This was explained in terms of diffusion theories, for interstitial atoms, which took account of exchange interactions.

N.I.Barmin, P.V.Geld, V.P.Levchenko, S.I.Masharov, R.A.Ryabov, N.I.Shvetsov: Doklady Akademii Nauk, 1974, 215[3], 567-9

 

Table 119

Permeation of H in Inconel Alloys

 

Alloy

T (K)

Pressure (Pa)

Po (μmol/m s kPa½)

E (kJ/mol)

Inconel 625

423-1007

0.2-15000

8.113

60.128

Inconel 718

364-1051

0.2-16000

3.034

56.350