Ni-Mo-B非晶态合金纳米颗粒的抗氧化性能研究  

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

作　　者：郑一雄[1,2] 姚士冰[1] 周绍民[1] 

机构地区：[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 [2]华侨大学材料科学与工程学院,泉州362011

出　　处：《物理化学学报》2004年第11期1352-1356,共5页Acta Physico-Chimica Sinica

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.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.

关 键 词：Ni-Mo-B非晶态合金 纳米颗粒 抗氧化 XPS 

分 类 号：TG139.8[一般工业技术—材料科学与工程]