The diffusion coefficients in the -phase were determined, at temperatures ranging from 980 to 1120K, by extrapolating the concentration dependences of the interdiffusion coefficients to infinite dilution. The results could be described by:

D (m2/s) = 3.8 x 10-5exp[-195(kJ/mol)/RT]

The Cu underwent fast impurity diffusion. It was concluded that the fast diffusion could be characterized by a large pre-exponential factor.

O.Taguchi, Y.Iijima: Philosophical Magazine A, 1995, 72[6], 1649-55

 

Table 239

Impurity Diffusion Coefficients for Ge in -Ti

 

Temperature (K)

D (m2/s)

1823

2.19 x 10-11

1773

1.66 x 10-11

1723

1.07 x 10-11

1673

7.68 x 10-12

1623

4.99 x 10-12

1573

3.37 x 10-12

1523

2.41 x 10-12

1473

1.62 x 10-12

1423

1.09 x 10-12

1373

6.70 x 10-13

1323

4.22 x 10-13

1273

2.58 x 10-13

1223

1.54 x 10-13

1173

9.56 x 10-14