An investigation was made of the effect of the Fe content upon Fe diffusion. A comparison was also made of the effect of the Fe concentration upon Fe diffusion in -type and -type alloys. It was concluded that Mössbauer spectroscopy was a useful method for clarifying microscopic diffusion mechanisms with regard to the jump frequencies of diffusing atoms. By taking account of Mössbauer data, a suppression of Fe diffusion (tables 298 and 299) could be attributed to the occurrence of a short-range ordering of Fe atoms. This ordering, which was perhaps of B2-type, led to a decrease in the number of diffusion paths for Fe atoms; thus producing a lower diffusivity.

H.Nakajima, S.Ohshida, K.Nonaka, Y.Yoshida, F.E.Fujita: Scripta Materialia, 1996, 34[6], 949-53

Table 297

Diffusion Parameters for Ti52Cu48 Amorphous

Alloy at 292 to 341K