Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (08): 750-752.doi: 10.3866/PKU.WHXB20010817

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Structural Study of Ni-B Ultrafine Amorphous Alloy during Annealed Crystallization

Wei Shi-Qiang;Zhang Xin-Yi;Liu Wen-Han;Wang Xiao-Guang;Yang Hong-Wei;Yan Wen-Sheng   

  1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029
  • Received:2001-01-08 Revised:2001-03-21 Published:2001-08-15
  • Contact: Wei Shi-Qiang E-mail:sqwei@ustc.edu.cn

Abstract: Xray absorption fine structure (XAFS) and Xray diffraction (XRD) have been combined to investigate the structure of NiB ultrafine amorphous alloy prepared by chemical reduction during the crystallization process. The results demonstrate that a fcclike nanocrystalline Ni phase with a mediumrange order and a nanocrystalline Ni3B alloy are formed at 573 K where the first exothermic process is observed. At annealing temperature of 773 K, large amount of NiB ultrafine amorphous alloy decomposes into metal Ni.

Key words: XAFS, XRD, Ni-B ultraine amorphous alloy