磁场和稀土Ce介入下化学镀Co-Ni-B合金的晶化行为  

Crystallization Behavior of Electroless Co-Ni-B Plating in Magnetic Field in the Presence of Cerium

作　　者：宣天鹏[1] 章磊[1] 黄芹华[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《应用化学》2003年第12期1143-1147,共5页Chinese Journal of Applied Chemistry

基　　金：安徽省自然科学基金资助项目 ( 0 0 0 464 0 2 )

摘　　要：利用恒电位仪、等离子发射光谱仪、电子能谱仪、X射线衍射仪、透射电子显微镜等研究了在常态和磁场条件下化学镀Co Ni B Ce合金的电化学性质、化学组成和组织结构。结果表明 ,微量稀土和磁场的介入改善了化学镀Co Ni B合金的静止电位和极化度 ;随镀液里稀土金属Ce量的增加 ,化学镀Co Ni B Ce合金镀层中的Ce含量是先增加后下降 ,均在Ce的质量浓度为 0 8g/L时达到最大值。在磁场和稀土铈的作用下 ,化学镀Co Ni B Ce合金镀层中B的含量减少 ,Co和Ni的含量增加 ,因而在常态下非晶态的Co Ni B镀层转变成了微晶结构的Co Ni B Ce镀层 ,在磁场条件下含稀土Ce的镀层则发生了晶化转变。The electrochemical property, chemical composition and crystal structure of electroless Co-Ni-B-Ce alloy plated in common state as well as in magnetic field were studied by means of potentiometer, plasma transmitting spectrometer, electron energy spectrometer, X-ray diffractometer and transmission electron microscope. The results showed that the static potential and polarizability of electroless Co-Ni-B alloy are remarkably improved as the plating is carried out in magnetic field in the presence of a little amount of cerium in plating bath. The cerium content in the electroless Co-Ni-B-Ce alloy increases at first with the increase of cerium in bath and decreases with maximum value at Ce0.8 g/L in plating baths. Under the action of magnetic field and rare metal cerium, the boron content in alloy is decreased, while cobalt and nickel contents are increased. As a resolut, a amorphous Co-Ni-B alloy is transformed to microcrystalline Co-Ni-B-Ce alloy when plating in is common state, and the latter plated in magnetic field is crystallized.

关 键 词：化学镀钴-镍一硼 晶体结构 稀土金属铈 磁场 

分 类 号：O646[理学—物理化学] TQ153.2[理学—化学]