稀土La对化学镀Co-Fe-B合金层晶体结构的影响  

Effect of Rare Lanthanum on Crystal Structure of Electroless Co-Fe-B Alloy Coating

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,安徽合肥230009

出　　处：《材料热处理学报》2003年第4期66-69,共4页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助 (50 371 0 2 3) ;安徽省自然科学基金资助 (0 0 0 4 640 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、透射电子显微镜等考察和分析了引入稀土金属La时化学镀Co Fe B合金的阴极极化曲线、沉积速度、化学成分和晶体结构。结果表明 ,稀土La的介入明显改善了化学镀Co Fe B合金的静止电位和极化度 ,随镀液里稀土金属La添加量的增加 ,合金的沉积速度和镀层中La的含量都是先增后降 ,且都在La加入 0 6g·L- 1 时达到最大值。稀土La的介入使化学镀Co Fe B La合金镀层中B的含量减少 ,Co和Fe的含量增加 ,并使具有非晶态结构的化学镀Co Fe B合金转化为晶态结构的化学镀Co Fe B La合金。The effect of rare metal lanthanum on cathode polarization curves,depositing speed,chemical composition and crystal structure of the electroless Co-Fe-B alloy plating was studied using potentiostat, plasma transmitting spectrograph, electron energy spectrometer, X-ray diffractometer and transmission electron microscopy.The results show that the static potential and polarizability of electroless Co-Fe-B alloy plating are remarkably improved in the presence of rare metal lanthanum. With increasing of lanthanum amount in plating bath, both depositing speed and lanthanum content of the alloy coating increase first and decrease afterwards, and both reach their peak values at La(0.6 g·L -1 ) in the plating bath. Under the action of rare metal lanthanum, the boron content is decreased, cobalt and iron contents are increased in the electroless Co-Fe-B-La alloy coating. At the same time amorphous Co-Fe-B alloy is transformed to crystalline Co-Fe-B-La alloy.

关 键 词：化学镀Co 稀土金属La 化学成分 晶体结构 

分 类 号：TQ153.2[化学工程—电化学工业] TG146.1[一般工业技术—材料科学与工程]