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Study of local environment of Cu atoms in Fe73.5Cu1Nb3Si13.5B9 alloy with different annealing temperature |
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| Authors: | Yu Zhang Ying Yang YuXin Wang Wei Lu Biao Yan |
| Institution: | 1. School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China 2. Shanghai Key Lab. of D&A for Metal-Functional Materials, Shanghai, 201804, China 3. Department of Chemical & Materials Engineering, the University of Auckland, PB 92019, Auckland, 1142, New Zealand |
| Abstract: | 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. |
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