Study on antioxidation of nanosize Ni-Mo-B amorphous alloy
Zheng Yi Xiong
Yao Shi Bing
Zhou Shao Min
- 化学化工－已发表论文 
The nanosize Ni-B and Ni-Mo-B amorphous alloy powders were prepared by chemical reduction with KBH4 in aqueous solution. Their amorphous stuctures 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 molybodnum 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.