超细Ni—B非晶态合金表面的AES研究  

The Surface Study of Amorphous Ni-B Ultra-fine Particles by AES

作　　者：杨军[1] 邓景发[1] 

机构地区：[1]复旦大学化学系

出　　处：《Chinese Journal of Chemical Physics》1994年第2期136-140,共5页化学物理学报（英文）

基　　金：国家教委博土点专项基金

摘　　要：用化学还原法制备了组成为Ｎｉ２．５２Ｂ（原子比）的超细非晶态合金，并用ＡＥＳ研究了氩刻时间、温度及氧对其表面组成的影响，发现其表面存在硼化物硼和氧化物硼两种硼物种；氧优先氧化表面的硼物种，并导致表面镍物种量的下降；对样品的热处理可导致表面组成发生突变，镍物种量几乎消失．Abstract The amorphous Ni2.52 B ultrafine particles were prepared by reducing Ni2+ ion with KBH4 in ethanol solution. The Auger electron spectroscopy (AES) was used to study the variations of surface composition with temperature, Ar+ sputter time and the exposure of oxygen.Two kinds of boron species were observed, they were assigned to boron interacting with nickel and oxidized boron, respectively. The oxidized boron were Produced both in the reduction process of Ni2+ and the oxidation processs of boron. It was also noticed that boron was preferentially oxidized in oxidation, and the oxidation of boron induced the decrease of surface concentration of nickle and the increase of concentration of boron species. The obviously change of surface composition was also observed by heating treatment. When the temperature was lower than 590K, the concentration of surface atoms changed a little. When the temperature was higher, the nickle almost disappeared, and the further investigations are needed to make sure the reason.

关 键 词：镍 硼 金属玻璃 AES 超细粉 

分 类 号：TG146.15[一般工业技术—材料科学与工程]