物理化学学报 >> 2004, Vol. 20 >> Issue (11): 1352-1356.doi: 10.3866/PKU.WHXB20041113

研究论文 上一篇    下一篇

Ni-Mo-B非晶态合金纳米颗粒的抗氧化性能研究

郑一雄;姚士冰;周绍民   

  1. 厦门大学化学化工学院,固体表面物理化学国家重点实验室,厦门 361005; 华侨大学材料科学与工程学院,泉州 362011
  • 收稿日期:2004-03-05 修回日期:2004-07-05 发布日期:2004-11-15
  • 通讯作者: 郑一雄 E-mail:yxzheng@hqu.edu.cn

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

摘要: 在水溶液体系中用化学还原法制备Ni-B和Ni-Mo-B非晶态合金纳米颗粒.SEM测试表明,样品的颗粒形貌呈球形或类球形,平均粒径约10nm.XPS分析结果表明,Ni-Mo-B非晶态合金中钼元素主要以氧化态形成于合金的表面,并导致合金表面合金化硼原子浓度显著增加,氧化态硼(B3+)的原子浓度显著减少,氧的原子浓度明显减少,合金化镍的原子浓度显著增加,氧化态镍(Ni3+)的原子浓度显著减少.因此,Ni-Mo-B合金的抗氧化性能显著高于Ni-B合金.XPS谱图分析还表明,在Ni-B和Ni-Mo-B非晶态合金中,存在Ni和B的合金化物Ni2B,其中B失去部分电子,而Ni则富余电子.Ni2B的氧化产生副产物Ni2O3和B2O3.

关键词: Ni-Mo-B非晶态合金, 纳米颗粒, 抗氧化, XPS

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