Secondary ion mass spectrometry was used to measure diffusion coefficients in single crystals of W at 2115 to 2470K (table 324). The isotope effect was studied for 50Cr and 54Cr, and was found to be equal to 0.18.

S.M.Klotsman, S.V.Osetrov, I.P.Polikarpova, G.N.Tatarinova, A.N.Timofeyev, O.P.Shepatkovskiy: Fizika Metallov i Metallovedenie, 1987, 64[1], 148-61. [Physics of Metals and Metallography, 1987, 64[1], 133-46])

Table 324

Diffusion of Cr in W