Sm_2(Fe,Al,Zr)_(17)C_(1.5)合金微结构与磁性能的关系  

Dependence of Magnetic Properties on Microstructure for Sm_2(Fe,Al,Zr)_17C_(1.5)Alloys

作　　者：唐卫[1] 阴津华[1] 吕丽娅 金志强[1] 章建荣[1] 都有为[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《中国稀土学报》1999年第1期32-35,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家攀登计划资助;江苏应用基础项目!BJ97043

摘　　要：用X射线衍射仪、振动样品磁强计、扫描电镜及透射电镜对Sm2Fe15．3Zr0.2Al1.5C1．5合金的微结构和磁性进行了研究。合金主要由2／17相、α-Fe相和ZrC相组成。在铸态下，合金微结构呈粗大的枝晶，其矫顽力和剩磁几乎为0；而经40m·s－1快淬及750℃×30min退火处理后获得了平均晶粒尺寸为35um的纳米晶结构，其矫顽力和剩磁分别为923KA·m(－1)，55Am2·kg(－1)。在以上工艺过程中相组成基本保持不变。因此，合金的磁性能主要取决于微结构的变化。The microstructure and magnetic properties of Sm2Fe15.3Zr0.2Al1.5 C1.5 samples were systematically studied using XRD, SEM, TEM and magnetic mesaurements The results showthat the Sm2Fe15.3Zr0.ZAl1.5C1.5 alloy consists mainly of 2/17, a-Fe and ZrC phases. The ascast alloy exibits a microstructure with co^grained dendrite, and its remanence and coeroivity are almost dual to zero. Melt-spun at 40 m' s-1 and annealed at 750 t for 30 min, the ribbon consists of a mixture of 2/17, a--Fe and ZrC phases with an average grain size of about 35urn. A high coercivity of up to 923 hA. m -- I along with a remanence of up to 55 A.2. kg-- I isobtained for the ribbon. It is suggested that the remanence and coercivity depend mainly on them'crostructure.

关 键 词：永磁体 钐 铁 铝 锆 稀土 合金 微结构 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]