Journal of Jishou University(Natural Sciences Edition) ›› 2002, Vol. 23 ›› Issue (1): 8-12.

• Physics and electronics • Previous Articles     Next Articles

XAFS and XRD Studies of Mechanically Alloyed Fe100-xCux


  1. (1.Dept.of Math.& Phys.,Univ.Hehai,Nanjing 210024,China;2.National Synchrotron Radiation Laboratory and Center for Fundamental Physics,University of Science and Technology of China,Hefei 230029,China)
  • Online:2002-03-15 Published:2013-01-05

Abstract: The structures of the mechanically alloyed Fe100-xCux (x=0,20,30,40,60,70,100) after milling for 80 hours were investigated by X-ray absorption fine structure (XAFS) and X-ray diffraction (XRD).When the weight ratio of the balls to the powder was 40:1,for the Fe100-xCux (x≥40) alloys,the XRD results show that diffraction peaks of α-Fe disapeared,and only the diffraction peaks with fcc-like structure were observed.The fcc-like lattice parameter increases with Fe concentration.On the contrary,for the Fe100-xCux (x<30) alloys,only the diffraction peaks with bcc-like structure were observed.The bcc-like lattice parameter decreases with Cu concentration.The XAFS results show that the local structure evolution of Fe atoms was different from that of Cu atoms.The local structures around Fe atoms had been greatly changed and its disorder evidently increased,but the Cu atoms maintain the original structure geometry.So,mechanically alloyed Fe100-xCux  is not a homogeneous supersaturated solid solution and consists of Fe-rich and Cu-rich regions.

Key words: X-ray absorption fine structure, X-ray diffraction, mechanical alloying

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