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Citation: Zheng Yi-Xiong, Yao Shi-Bing, Zhou Shao-Min. Study on Antioxidation of Nanosize Ni-Mo-B Amorphous Alloy[J]. Acta Physico-Chimica Sinica, ;2004, 20(11): 1352-1356. doi: 10.3866/PKU.WHXB20041113 shu

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

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 Date: 5 March 2004
Available Online: 15 November 2004

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.
- Ni-Mo-B amorphous alloy;Nanoparticle;Antioxidation;XPS
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