摘要
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 trans- form 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.
基金
supported by the National Natural Science Foundation of China(Grant No.51071109)
the Young Excellent Talents in Tongji University(Grant No.2009KJ003)
