铁基纳米晶磁性与磁化过程研究  

Magnetic Properties and Magnetization Process ofFeBased Nanocrystalline Alloys

作　　者：周桂琴[1] 连法增 

机构地区：[1]东北大学材料科学与工程系

出　　处：《金属功能材料》1998年第3期111-113,共3页Metallic Functional Materials

摘　　要：研究了Ｆｅ－Ｃｕ－Ｎｂ－Ｓｉ－Ｂ系纳米晶合金中Ｓｉ与Ｂ含量的相对变化、退火工艺对磁性的影响，分析和探讨磁化过程的变化规律和变化机制。从ＳＥＭ照片中可以看到Ｃｕ、Ｎｂ对晶粒有明显的细化作用。Ｓｉ含量降低、Ｂ含量增加使晶化温度升高，最佳晶化热处理温度提高。不同热处理工艺影响材料的微结构变化，也使得材料的磁结构不同。铁基纳米晶合金较高的初始磁导率，特别低的矫顽力表明其起始磁化应主要为畴壁位移过程，而高场下为畴壁位移和磁矩转动同时存在的过程，使得磁化迅速趋于饱和，剩磁比较高。The relative variation of Si and B content,and annealing technology on magnetic properties of FeCuNbSiB alloy system were investigatedThe variation rule and mechanism in magnetization process were analyzedFrom the SEM photograph,it can be seen that Cu and Nb can refine grainsThe crystallizing temperature goes up when B content increases and Si content decreases,and the optimum crystallizing treatment temperature increasesThe different treatment process affect the microstructure and magnetic structure of the alloy materialsThe high initial permeability and the low coercivity of the Febased nanocrystalline alloys show that the initial magnetization is mainly the process of the domain wall displacementWhile at high magnetic field,the domain wall displacement and magnetic moment rotation take effect simultaneously,so that the remanence is higher

关 键 词：Fe-Cu-Nb-Si-B 纳米晶 磁性 退水 磁化 

分 类 号：TM270.1[一般工业技术—材料科学与工程] TG139.8[电气工程—电工理论与新技术]