The bulk diffusivity was measured by using serial sectioning methods (sputtering by Ar ions in a direct-current glow discharge) at temperatures of 893 and 953K (table 32). It was proved that the contribution which constitutional vacancies made
to the bulk diffusion mobility of Ni atoms was negligible at temperatures down to 893K.
Low-Temperature Tracer Diffusion of Nickel in Ni3Al Intermetallic. Cermák, J., Stloukal, I.: Scripta Materialia, 1997, 36[4], 433-7
Table 29
Bulk diffusion of Ni in Ni3Al-based alloys
Alloy | Temperature (K) | D (m2/s) |
Ni-Al | 1323 | 4.3 x 10-16 |
Ni-Al | 1273 | 1.6 x 10-16 |
Ni-Al | 1173 | 1.4 x 10-17 |
Ni-Al | 1073 | 1.7 x 10-18 |
Ni-Al | 973 | 3.2 x 10-19 |
Ni-Al-Hf | 1373 | 8.0 x 10-16 |
Ni-Al-Hf | 1323 | 3.3 x 10-16 |
Ni-Al-Hf | 1273 | 7.6 x 10-17 |
Ni-Al-Hf | 1223 | 3.1 x 10-17 |
Ni-Al-Hf | 1173 | 6.7 x 10-18 |
Ni-Al-Hf | 1123 | 3.2 x 10-18 |
Ni-Al-Hf | 1073 | 8.0 x 10-19 |
Ni-Al-Hf | 1023 | 1.1 x 10-19 |
Ni-Al-W | 1373 | 3.4 x 10-16 |
Ni-Al-W | 1323 | 1.5 x 10-16 |
Ni-Al-W | 1273 | 5.4 x 10-17 |
Ni-Al-W | 1223 | 2.0 x 10-17 |
Ni-Al-W | 1173 | 4.7 x 10-18 |
Ni-Al-W | 1123 | 1.8 x 10-18 |
Ni-Al-W | 1073 | 3.5 x 10-19 |
Ni-Al-W | 1023 | 8.1 x 10-20 |
Ni-Al-Co | 1323 | 4.0 x 10-16 |
Ni-Al-Co | 1273 | 2.0 x 10-16 |
Ni-Al-Co | 1223 | 4.3 x 10-17 |
continued
Table 29 (continued)
Bulk diffusion of Ni in Ni3Al-based alloys
Alloy | Temperature (K) | D (m2/s) |
Ni-Al-Co | 1173 | 1.6 x 10-17 |
Ni-Al-Co | 1123 | 4.4 x 10-18 |
Ni-Al-Co | 1073 | 2.1 x 10-18 |
Ni-Al-Co | 1023 | 2.0 x 10-19 |
Ni-Al-Cr | 1323 | 4.3 x 10-16 |
Ni-Al-Cr | 1273 | 2.1 x 10-16 |
Ni-Al-Cr | 1223 | 4.3 x 10-17 |
Ni-Al-Cr | 1173 | 2.0 x 10-17 |
Ni-Al-Cr | 1123 | 4.3 x 10-18 |
Ni-Al-Cr | 1073 | 9.0 x 10-19 |
Ni-Al-Cr | 1023 | 3.3 x 10-19 |