The interdiffusion of discs of Co50Ti50 and Co54Ti46 was studied by means of electron-probe micro-analysis. It was found that the interdiffusion data (table 34) obeyed an Arrhenius relationship of the form:

D (m2/s) = 5.4 x 10-5exp[-265(kJ/mol)/RT]

It was suggested that these values of the pre-exponential factor and activation energy reflected an intrinsic volume diffusion behavior.

W.Sprengel, T.Horikoshi, H.Nakajima: Scripta Materialia, 1996, 34[3], 449-53

 

 

 

Table 34

Interdiffusion in CoTi

 

Temperature (K)

D (m2/s)

1574

5.82 x 10-14

1524

3.97 x 10-14

1473

3.00 x 10-14

1424

1.51 x 10-14

1378

4.97 x 10-15

1323

9.89 x 10-16

1273

1.24 x 10-15

1221

1.62 x 10-16

1172

8.51 x 10-17