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The local environment of Cu atoms in Fe73.5Cu1Nb3Si13.5B9 alloy was investigated by extended X-ray absorption fine structure(EXAFS).Cu clusters began to order when the annealing temperature was around 733 K from the results of the Fourier transform curves.The fitting results showed that the first shell of the near fcc(face-centered cubic)Cu clusters only contained Cu atoms.The coordination number increased with the annealing temperature.Subsequently,the occupancy rate increased from 33.3%(annealed at 733 K)to 100% (annealed at 853 K).This local structural change of Cu atoms could probably affect the distribution of the bcc(body-centered cubic)α-Fe in Fe73.5Cu1Nb3Si13.5B9 alloy.
The local environment of Cu atoms in Fe73.5Cu1Nb3Si13.5B9 alloy was investigated by extended X-ray absorption fine structure (EXAFS). Cu clusters began to order when the annealing temperature was around 733 K from the results of the Fourier transform curves. fitting results showed that the first shell of the near fcc (face-centered cubic) Cu clusters only contained Cu atoms. coordination number increased with annealing temperature. Substituted, the occupancy rate increased from 33.3% (annealed at 733 K) to 100 % (annealed at 853 K). This local structural change of Cu atoms could probably affect the distribution of the bcc (body-centered cubic) α-Fe in Fe73.5Cu1Nb3Si13.5B9 alloy.