稀土钐钴永磁功能合金膜的电沉积制备及磁学性能-中国有色金属学报.PDF

第 17 卷第 5 期 中国有色金属学报 2007 年 5 月 Vol.17 No.5 The Chinese Journal of Nonferrous Metals May 2007 文章编号：1004-0609(2007)05-0750-07 稀土钐钴永磁功能合金膜的电沉积制备及磁学性能 龚晓钟，汤皎宁，李均钦，钱雪梅，雷 虹 (深圳大学 理学院 深圳市特种功能材料重点实验室，深圳 518060) 摘 要：在尿素-NaBr-KBr- 甲酰胺体系中电沉积制备稀土−铁系金属(Sm-Co)合金，研究沉积液中主盐浓度配比、 电流密度等工艺参数对沉积膜的形貌及合金含量的影响。用扫描电镜(SEM)观察金属Sm-Co合金沉积膜表面形貌， 结果表明，金属Sm-Co合金沉积膜较平整均匀，呈现银灰色；X射线衍射(XRD)分析表明稀土金属Sm-Co合金为 SmCo5六方晶体；特征X射线谱(EDS)证明沉积膜由金属Sm、金属Co和极少量的O、C组成，单质Sm的含量(质量 分数)为29.07%，单质Co含量为63.51%；Sm与Co 的摩尔比约为1׃5；经Ar离子对样品表面层溅射后，X射线光电子 能谱(XPS)测定结果进一步证明，沉积层为单质Sm和单质Co 。并研究了Sm-Co合金的磁学性能，如矫顽力、磁矩 及最大磁能积。用聚乙烯醇保护膜涂附可以防止稀土合金氧化。 关键词：金属材料；稀土元素；合金；非水体系；电沉积；磁学性质 中图分类号：O 614.41; TB 383 文献标识码：A Electrodeposition and magnetic property of rare earth magnetic function alloy film GONG Xiao-zhong, TANG Jiao-ning, LI Jun-qin, QIAN Xue-mei, LEI Hong (Shenzhen Key Laboratory of Special Functional Materials, School of Science, Shenzhen University, Shenzhen 518060, China) Abstract: The rare earth-iron series of Sm-Co alloy film on Si substrate were electrodeposited in urea- NaBr-KBr-formamide solution. The results that obtained by XRD, SEM, EDS and XPS and magnetic measurement show that the silver gray alloy film belongs to SmCo5 hexagonal crystal. The film is dense, homogeneity and smooth. The magnetic properties for Sm-Co alloy film was studied, such as the saturation magnetization, coercive force and (BH)max . A polyvinyl alcohol film is deposited on the Sm-Co film for protection of oxidation. Key words: metallic materials; rare earth; alloy; nonaqueous system; electrodeposition; magnetic property 我国稀土金属研究及应用主要集中在磁性材料， 有机溶剂