The diffusivity and solubility of implanted Au in the -phase were determined at temperatures of between 823 and 1023K by using Rutherford back-scattering spectrometry. The results showed that the solubility of Au varied from 0.2 to 0.35at%. The diffusion data (table 269) could be described by the expression:

D (m2/s) = 1.9 x 10-5exp[-260(kJ/mol)/RT]

It was considered that these results were typical of a substitutional diffusion mechanism.

J.H.R.Dos Santos, P.F.P.Fichtner, M.Behar, R.Perez, F.Dyment: Applied Physics A, 1994, 58[5], 453-7

 

Table 269

Diffusivity of Au in -Ti as a Function of Temperature

 

Temperature (K)

D (m2/s)

823

7.6 x 10-22

873

7.5 x 10-21

923

4.1 x 10-20

943

8.2 x 10-20

973

3 x 10-19