Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (11): 1352-1356.doi: 10.3866/PKU.WHXB20041113

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Study on Antioxidation of Nanosize Ni-Mo-B Amorphous Alloy

Zheng Yi-Xiong;Yao Shi-Bing;Zhou Shao-Min   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005; College of Material Science and Engineering, Huaqiao University, Quanzhou 362011
  • Received:2004-03-05 Revised:2004-07-05 Published:2004-11-15
  • Contact: Zheng Yi-Xiong E-mail:yxzheng@hqu.edu.cn

Abstract: The nanosize Ni-B and Ni-Mo-B amorphous alloy powders were prepared by chemical reduction with KBH4 in aqueous solution .Their amorphous structures were determined by XRD .The SEM characterization demonstrates that all samples exhibit a spherical or sphere-like morphology with an average size of around 10 nm. The XPS characterization shows that the molybdenum species in the Ni-Mo-B samples are mainly present on the surface of Ni-Mo-B alloy in the oxidized form. Compared with Ni-B alloy, the surface atomic content of alloying boron and alloying nickel of Ni-Mo-B alloy shows a considerable increase, the surface atomic content of oxidized boron, oxidized nickel and oxygen of Ni-Mo-B alloy shows a considerable decrease. Thus, XPS results have proven that the Ni-Mo-B amorphous alloy exhibits stronger antioxidation ability than the amorphous Ni-B alloy. XPS characterization also shows that Ni2B is presented in the Ni-B and Ni-Mo-B samples, and the alloying nickel is electron-enriched while the alloying boron is electron-deficient. Ni2O3 and B2O3 are byproducts of the Ni2B oxidation.

Key words: Ni-Mo-B amorphous alloy, Nanoparticle, Antioxidation, XPS