Interdiffusion coefficients in the phase were measured at temperatures ranging from 1116 to 1583K. No appreciable concentration dependence of the coefficient was observed in the present single-phase couples. The temperature dependence of the interdiffusivity could be described by:
D(m2/s) = 0.00028 exp[-295(kJ/mol)/RT]
W.Sprengel, N.Oikawa, H.Nakajima: Intermetallics, 1996, 4[3], 185-9
Table 291
Diffusion of 44Ti in Ti68Al32
Temperature (K) | D (m2/s) |
1373 | 2.5 x 10-16 |
1322 | 8.7 x 10-17 |
1273 | 4.1 x 10-17 |
1126 | 1.2 x 10-18 |