Sm(CoFeCuZr)_(12)快淬薄带的晶体织构与磁性能各向异性  

Crystalline texture and magnetic anisotropy of Sm(CoFeCuZr)_(12) melt-spun ribbons

作　　者：潘晶[1] 刘新才[1] 郭鹏举[1] 肖军[1] 徐峰[1] 

机构地区：[1]宁波大学材料科学与化学工程学院省部共建国家重点实验室培育基地,宁波315211

出　　处：《中国有色金属学报》2008年第11期2020-2024,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家重大基础研究发展计划前期专项资助项目(2004CCA04000);国家自然科学基金资助项目(50744014);浙江省自然科学基金资助项目(Y406389);宁波市科技攻关资助项目(2006B100054);宁波大学王宽诚幸福基金资助项目

摘　　要：在辊表面速度为15～35 m/s的条件下制备Sm(Co0.68Fe0.20Cu0.08Zr0.04)12合金快淬薄带,对薄带的微观组织、晶体织构和磁性能各向异进行研究。结果表明:薄带的微观组织由成束的Th2Ni17型结构的2-17相取向柱晶在薄带平面内交织排列而成,每一束柱晶内各个柱晶之间互相平行,而各束柱晶的取向随机分布;随着辊速从15 m/s增加到35 m/s,柱晶宽度显著细化,在35 m/s时达到285 nm;当辊表面速度分别为15、25和35 m/s时,薄带自由面的衍射谱中衍射峰强度比(I(200)/I(111))分别为3.0、3.6和4.5,表明快淬薄带自由面存在(200)晶体织构并且随着辊速的增大而增强,2-17相柱状晶的易磁化方向[001]晶向则处于薄带平面内;平行于薄带平面方向的饱和磁化强度和剩磁比垂直于薄带平面方向的分别高出0.21～0.37 T和0.04～0.10 T;随着辊速从15 m/s增大到35 m/s,薄带的饱和磁化强度、剩余磁化强度和矫顽力都相应提高。Sm（Co0.68Fe0.20Cu0.08Zr0.04）12 melt-spun ribbons were prepared at wheel surface speed of 15-35 m/s. The microstructures, crystalline texture and magnetic anisotropy were studied. The results show that the microstructures of the melt-spun ribbons are composed of many binds of oriented columnar of 2：17 phase with Th2Ni17-type structure. Within a bind, many columns parallel to each other. And the directions of the binds are distributed randomly in the ribbon plane. With the wheel surface speed increasing from 15m/s to 35m/s, the average widths of the columnar sharply decrease, and it is 285 nm at 35 m/s. The intensity ratios of I（200） to I（111） in the XRD patterns on the ribbon plane which are melted at the wheel surface speed of 15, 25 and 35 m/s are 3.0, 3.6 and 4.5, respectively. This exhibits the existence of （200） texture in the ribbon plane and it is intensified with increasing wheel surface speed. Thus, the easy magnetization axes [001] of 2：17H columnar are in the ribbon plane. The saturation magnetization and residual magnetization of the ribbons measured along the length direction in the ribbon plane are 0.21-0.37 T and 0.04-0.10 T higher than those measured along the direction perpendicular to the ribbons. As the wheel surface speed increases from 15 m/s to 35 m/s, the intrinsic coercive is enhanced, and so are the saturation magnetization and the residual magnetization.

关 键 词：Sm-Co合金 快淬薄带 晶体织构 磁各向异性 

分 类 号：TM273[一般工业技术—材料科学与工程]