Table 1 Arrhenius parameters for Ni GB diffusion in HEAs and other FCC matrices. Q is the activation energy and P 0 the pre-exponential factor for GB diffusion.
Matrix | Tm (K) | Qgb (kJ/mol) | P 0 (10–12 m3s−1) | D0gb (10–2m2s−1) = P 0/δ | Qgb * = Qgb/RTm | Qv (kJ/mol) | Qv * = Qv/RTm | Ref.a |
|---|---|---|---|---|---|---|---|---|
99.999wt.% Ni | 1728 | 128 | 0.0088 | 0.0018 | 8.91 | 292 | 19.9 | |
99.99 wt.% Ni | 1728 | 165 | 0.24 | 0.048 | 11.5 | 292 | 19.9 | |
Fe-40Ni | 1723 | 157 | 0.113 | 0.026 | 11.0 | 303 | 21.2 | |
CoCrFeNi | 1717 | 158±7 | \({0.011}_{-0.007}^{+0.019}\) | \({0.0022}_{-0.002}^{+0.005}\) | 11.3 | 258 | 18.1 | Present work10, |
CoCrFeMnNi | 1607 | 221±14 | \({142}_{-123}^{+915}\) | \({28}_{-25}^{+190}\) | 16.5 | 304 | 22.7 | Present work10, |
