退火温度对(Fe_(0.5)Co_(0.5))_(78.4)Si_9B_9Nb_(2.6)Cu_1软磁合金高频磁性的影响  

Influence of Annealing Temperature on High Frequency Magnetic Properties of(Fe_(0.5)Co_(0.5)_(78.4)Si_9B_9Nb_(2.6)Cu_1 Soft Magnetic Alloy

作　　者：傅中泽 张群[1] 

机构地区：[1]天津航海仪器研究所,天津300131

出　　处：《金属功能材料》2014年第3期40-43,共4页Metallic Functional Materials

摘　　要：研究了不同退火温度对（Fe0.5Co0.5）78.4Si9B9Nb2.6Cu1纳米晶软磁合金结构和高频磁性的影响。结果表明,在初始晶化温度455℃以上退火,在非晶基体中析出α—FeCo相。随着退火温度的升高,开始出现有序的（Fe,Co）3Si。当退火温度高于620℃时,出现硼化物硬磁相。490℃退火后合金的初始磁导率最高可达23000,晶粒尺度为19.4 nm。在490610℃退火,随退火温度的提高,合金复数磁导率下降,但截止使用频率提高。实验观察到该合金的磁谱曲线为驰豫型,截止使用频率fr为3.145.64 MHz,明显高于Fe基纳米晶软磁合金。Influence of annealing temperature on structure and high frequency magnetic properties of nanocrystalline（Fe_（0.5）Co_（0.5））_（78.4）Si_9B_9Nb_（2.6）Cu_1Soft magnetic alloy was investigated.Results indicated that,annealed above the initial crystallized temperature 455 ℃,the amorphous（Fe_（0.5）Co_（0.5））_（78.4）Si_9 B_9 Nb_（2.6） Cu_1 alloy was crystallized and α-FeCo phase was precipitated from the amorphous matrix.With the increasing of annealing temperature anordered（Fe,Co）_3Siphase was formed.When the annealing temperature is above 620 ℃,the boride hard magnetic phase was detected.The highest initial permeability at the frequency of 50 Hz was 23000 for the alloy annealed at 490 ℃,and the corresponding diameter of crystalline is 19.4 nm.An relaxed permeability-frequency spectra was observed in the frequency ranges of 100 kHz-10 MHz,and with increasing of annealing temperature from 490 ℃ to 610 ℃,the complex permeability was deteriorated slightly but the cut-off frequency f_r was enhanced from 3.14 to 5.64 MHz which is much higher than that of Fe-based nanoceystalline soft magnetic alloys.

关 键 词：纳米晶软磁材料 复数磁导率 品质因数 各向异性场 

分 类 号：TG132.271[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—合金]