快淬Sm_2(Fe,Al,Zr)_(17)C_(1.5)合金的磁性  

Magnetic Properties of Melt-Spun Sm_2 (Fe, Al, Zr)_(17)C_(1. 5) Ribbons

作　　者：唐卫[1] 吕丽娅 章建荣[1] 金志强[1] 张世远[1] 都有为[1] 王艳[2] 刘先昆[2] 潘红兵[2] 徐键键[2] 

机构地区：[1]南京大学物理系,南京210093 [2]南京大学应用物理研究所,南京210093

出　　处：《磁性材料及器件》1997年第4期5-7,共3页Journal of Magnetic Materials and Devices

基　　金：国家攀登项目!"纳米材料科学";江苏省应用基础项目!BJ97043

摘　　要：利用X衍射仪）、振动样品磁强计对台Zr快淬Sm_2Fe_（15.5-x）ZrxAl_(1.5)C_(1.5)（x=0～0.8)合金的微结构和磁性进行了研究。结果表明，在合金中添加Zr以后，形成了一个高熔点的ZrC相。ZrC相弥散分布在品位边界或品社交偶处，可有效地抑制快淬合金在品化过程中的晶粒长大。样品在750℃经30分钟时效后，获得的最佳剩磁为55A·m^2/kg，矫顽力为923kA／m。其退磁曲线具有较好的方形度。可以认为高剩磁和矫顽力是由于添加Zr以后获得了细小的微结构的结果．The structure and magnetic properties of melt-spun Sm_2Fe_(15.5-x)ZrxAl_(1.5)C_(1.5) samples have been studied using X-ray diffraction and a vibrating sample magnetometer. Addition of Zr to Sm_2Fe_(15.5-x)ZrxAl_(1.5)C_(1.5) alloys results in the formation of a ZrC compound with a high melting point. The ZrC compound distributes diffusely around grain boundaries or at grain junc- tions,and is effective at inhibiting grain growth during crystallizing process. A high coercivity of up to 923 kA/m along with a remanence of up to 55 A .m2/kg is obtained for the Sm2Fe15.3Zr0.2 Al1.5C1.5 ribbon annealed at 75OC for 30 min. The high remanence and coercivity are ascribed to the addition of Zr,which results in a small crystal size.

关 键 词：微结构 磁性 稀土永磁体 快淬合金 

分 类 号：TM273.014.[一般工业技术—材料科学与工程]