Co添加对快淬Fe-Si-Al合金结构及磁性能的影响  

Effect of Co Addition on the Phase Structure and Magnetic Properties of Fe-Si-Al Alloys

作　　者：王伟[1] 马天宇[1] 罗伟[1] 严密[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《稀有金属材料与工程》2008年第6期1081-1084,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50471041);高等学校博士学科点专项科研基金项目(2004335046);新世纪优秀人才支持计划资助

摘　　要：采用快淬法制备了(Fe1-xCox)85Si9.6Al5.4(x=0,0.05,0.10,0.15,0.20,质量分数,%)四元合金薄带,经高能球磨获得扁平化程度良好的微粉。球磨粉在氮气保护下,在773K退火30min。退火磁粉与适量环氧树脂相混合,在30MPa下压制成Φ19mm×Φ10mm×3mm的圆环样品,利用XRD,VSM等研究了Co添加对Fe-Si-Al微粉结构和磁性能的影响。结果表明:添加Co并不改变快淬薄带样品的相结构,但能显著提高居里温度;当x=0.15时,获得最大的饱和磁化强度Ms为129.8A·m2/kg,圆环样品在GHz频段均显示良好的抗电磁干扰特性,x=0.15的样品截止频率达到1.154GHz。（Fe1-xCox）85Si9.6Al5.4 （x=0, 0.05, 0.10, 0.15, 0.20） nanocrystalline flakes with large aspect ratio have been prepared by high-energy planetary ball milling method from melt spun ribbons. Annealing at 773 K for 30 min has been employed to the as-milled powder under the protection of nitrogen. The annealed powder is then mixed with resin to get toroidal samples of Ф19 mm ×Ф10 mm × 3 mm at 30 MPa. The effects of Co addition on the phase structure and magnetic properties have been discussed detailed. The results show that the Co addition doesn＇t change the phase structure of alloy ribbons. However, The Curie temperature has been greatly increased by Co addition; the maximum saturation magnetization is achieved when x=0.15. The toroidal samples show a good anti electromagnetic interference （EMI） performance at about 1 GHz. The cutoff frequency reaches 1.154 GHz when x=0.15.

关 键 词：快淬法 sendust合金 纳米晶 截止频率 

分 类 号：TG113[金属学及工艺—物理冶金]