The diffusion of Cr in single crystals was investigated, by using secondary ion mass spectrometry, at 2195 to 2461K. The results could be described by:

D (cm2/s) = 4.0 x 100 exp[-137(kcal/mol)/RT]

S.M.Klotsman, G.N.Tatarinova, A.N.Timofeev: Materials Science Forum, 1987, 15-18, 457-62

Table 323

Diffusion of 57Co in W Monocrystals

 

Temperature (K)

D (cm2/s)

2265

6.11 x 10-13

2144

1.30 x 10-13

2080

6.03 x 10-14

1984

1.23 x 10-14

1861

1.49 x 10-15

1773

3.23 x 10-16

1684

8.24 x 10-17

1573

9.56 x 10-16

1561

3.47 x 10-17