快淬Sm-Fe-Cu-Si-C合金带的组织与磁性能  

Microstructure and Magnetic Properties of Melt-Spun Sm-Fe-Cu-Si-C Ribbons

作　　者：包小倩[1] 张茂才[1] 乔袆[1] 高学绪[1] 刘湘华[1] 周寿增[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《磁性材料及器件》2002年第2期1-4,共4页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(10074005)

摘　　要：利用单辊快淬法(Vs=15～40m/s)制备了Sm10Fe68.5Cu4Si10C7.5纳米永磁合金。采用X射线衍射、室温磁性能测量等手段分析了合金的组织和磁性能。系统研究了快淬工艺和退火工艺对合金永磁性能的影响。研究结果表明,快淬速度对快淬带最佳退火所需的条件以及最佳退火后的组织和磁性能影响很大。20m/s为最佳快淬速度,将其短时间退火后磁性能最佳;Hci=980.3kA/m,Jr=0.52T,Jr/Js=0.75,(BH)max=44.8kJ/m3。15m/s为欠淬速度,在25～40m/s随辊速提高快淬带组织由部分非晶过渡到完全非晶,其最佳退火后的剩磁比、矫顽力和磁能积均逐渐降低。Ribbons of Sm10Fe68.5Cu4Si10C7.5 were obtained by single-roller rapid quenching with quenching speed of 15～40m/s. The X-ray diffraction and room temperature magnetic measurement were performed to analyze the microstructure and magnetic properties of ribbons. The influence of quenching speed and annealing condition on the microstructure and magnetic properties of the alloy were systematically investigated. Results show that optimal annealing condition, microstructure and magnetic properties of annealed ribbons are strongly depended on quenching speed. For the optimal speed, 20m/s, Hci of 980.3kA/m,Jr of 0.52T, Jr/Js of 0.75 and (BH)max of 44.8kJ/m3 were obtained after annealing for a short time. 15 m/s is slower than optimal quenching speed. Hci, (BH)max and Jr/Js of the optimally annealed ribbons are gradually decreased with the quenching speed increasing from 25m/s to 40m/s.

关 键 词：Sm-Fe-Cu-Si-C合金 组织 磁性能 熔体快淬 永磁性能 微结构 单辊快淬法 

分 类 号：TM274[一般工业技术—材料科学与工程]