热处理工艺对Fe_(75.5)Si_(12.9)B_7Cu_1Nb_(1.8)V_(1.4)Co_(0.4)纳米晶合金高频软磁性能的影响
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摘要
采用单辊熔融旋淬工艺制备了Fe_(75.5)Si_(12.9)B_7Cu_1Nb_(1.8)V_(1.4)Co_(0.4)非晶合金薄带,分析了合金的晶化保温时间(t)、最终退火温度(T_a)和横磁场强度(H)对纳米晶合金高频软磁性能的影响。结果表明,预选定T_a=550℃,当t为150 min时,有效磁导率(μ_e)最高、铁损P_(5/20k)(测试频率f=20 kHz,设定磁感B=0.5 T)和矫顽力(H_c)最低(f<100 kHz),当f=1 kHz时,μ_e=80 900,H_c=3.17 A/m,P_(5/20k)=37.64 W/kg,T_a为530～610℃,对纳米晶合金进行真空普通退火,当T_a分别为550和610℃时,P_(5/20k)有两个谷值,分别为37.64和35.28 W/kg。对于某一特定T_a,随着电流强度I增加,P_(5/20k)呈现先下降再上升的趋势;对于某一特定I,P_(5/20k)在550和610℃均具有谷值。实验发现,当t=150℃,T_a=610℃,I=40 A时,磁芯获得最佳高频软磁性能(P_(5/20k)=20.26 W/kg,B_r=0.3 T)。
The Fe_(75.5)Si_(12.9)B_7Cu_1Nb_(1.8)V_(1.4)Co_(0.4) amorphous alloy ribbon was prepared by single-roller melting spin-quenching process. The effects of crystallization holding time(t), final annealing temperature(T_a) and transverse magnetic field strength(H) on the high frequency soft magnetic properties of nanocrystalline alloys were analyzed in the current paper. The results indicate that the highest effective magnetic permeability(μ_e), the lowest P_(5/20 k )(the iron loss under frequency(f) of 20 kHz, flux density(B) of 0.5 T) and the lowest coercivity H_c(f<100 kHz) could be obtained while T_a=550 ℃, t=150 min,while f=1 kHz, μ_e,H_(c )and P_(5/20 k )were 80 900, 3.17 A/m and 37.64 W/kg, respectively. The normal annealing of the nanocrystalline alloys were performed in vacuum at the various T_a ranged from 530 to 610 ℃, the lower P_(5/20 k )value of 37.64 and 35.28 W/kg could be achieved at 550 and 610 ℃, respectively. For a specific T_a, the P_(5/20 K) decreased initially and then increased with increasing the direct current I. For a particular I, the relatively lower P_(5/20 K) of nanocrystalline alloys could be achieved at 550 and 610 ℃. As a result, the optimum high frequency soft magnetic properties(P_(5/20 K)=20.26 W/kg, B_r=0.3 T) of nanocrystalline alloy were obtained while T_a, t and I were 610 ℃, 150 min and 40 A, respectively.
The Fe_(75.5)Si_(12.9)B_7Cu_1Nb_(1.8)V_(1.4)Co_(0.4) amorphous alloy ribbon was prepared by single-roller melting spin-quenching process. The effects of crystallization holding time(t), final annealing temperature(T_a) and transverse magnetic field strength(H) on the high frequency soft magnetic properties of nanocrystalline alloys were analyzed in the current paper. The results indicate that the highest effective magnetic permeability(μ_e), the lowest P_(5/20 k )(the iron loss under frequency(f) of 20 kHz, flux density(B) of 0.5 T) and the lowest coercivity H_c(f<100 kHz) could be obtained while T_a=550 ℃, t=150 min,while f=1 kHz, μ_e,H_(c )and P_(5/20 k )were 80 900, 3.17 A/m and 37.64 W/kg, respectively. The normal annealing of the nanocrystalline alloys were performed in vacuum at the various T_a ranged from 530 to 610 ℃, the lower P_(5/20 k )value of 37.64 and 35.28 W/kg could be achieved at 550 and 610 ℃, respectively. For a specific T_a, the P_(5/20 K) decreased initially and then increased with increasing the direct current I. For a particular I, the relatively lower P_(5/20 K) of nanocrystalline alloys could be achieved at 550 and 610 ℃. As a result, the optimum high frequency soft magnetic properties(P_(5/20 K)=20.26 W/kg, B_r=0.3 T) of nanocrystalline alloy were obtained while T_a, t and I were 610 ℃, 150 min and 40 A, respectively.
引文
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[2] Gupta P,Ganguli T,Gupta A,et al.Influence of isochronal annealing on the microstructure and magnetic properties of Cu-free HITPERM Fe40.5Co40.5Nb7B12 alloy[J].Journal of Applied Physics,2012,111(11):6044.
[3] Sinha A K,Singh M N,Upadhyay A,et al.A correlation between the magnetic and structural properties of isochronally annealed Cu-free Finemet alloy with composition Fe72B19.2Si4.8Nb4[J].Applied Physics A,2015,118(1):291-299.
[4] Wang Lijun,You Pei.Nanocrystalline soft magnetic alloys for inverter cores[J].Metallic Functional Materials,2000,7(5):21-27(in Chinese).王立军,尤培.逆变电源用纳米微晶软磁铁芯[J].金属功能材料,2000,7(5):21-27.
[5] 王立军,陈文智,王六一,等.大功率逆变电源用铁基纳米晶磁芯及制造方法:CN 101477868A[P].2009-07-08.
[6] Gan Zhanghua,Zhou Huanhua,Dai Yi,et al.Preparation and soft magnetic properties of higt-toughness/low boron iron-based amorphous ribbon[J].Journal of Materials Science and Engineering,2013,31(6):819-822(in Chinese).甘章华,周欢华,戴义,等.低硼高韧性铁基非晶薄带的制备及其软磁特性[J].材料科学与工程学报,2013,31(6):819-822.
[7] Xiao H Y,Wang A D,Zhao C L,et al.Industrialization of a FeSiBNbCu nanocrystalline alloy with high Bs of 1.39T and outstanding soft magnetic properties[J].Journal of Materials Science:Materials in Electronics,2018,29:19517-19523.
[8] Suzuki K,Ito N,Garitaonandia J S,et al.Local random magnetocrystalline and macroscopic induced anisotropies in magnetic nanostructures[J].Journal of Non-Crystalline Solids,2008,354:5089-5092.
[9] Park J Y,Suh S J,Kim K Y,et al.The effect of magnetic field annealing on magnetic properties in ultrathin Fe-based nanocrystalline alloys[J].IEEE Transactions on Magnetics,1997,33(5):3799-3801.
[10] Lyu Wei.Affection of thermal treatment on magnetism for Finemet nano-alloy[J].Materials Science and Technology,2013,21(6):91-96(in Chinese).吕玮.退火工艺对Finemet纳米合金磁性能的影响[J].材料科学与工艺,2013,21(6):91-96.
[11] Li Z,Yao K,Li D,et al.Core loss analysis of Finemet type nanocrystalline alloy ribbon with different thickness[J].Progress in Natural Science:Materials International,2017,27(5):588-592.
[12] Liu Xiaochuang,Li Zhun,Cui Xinghua,et al.Effects of magnetic field heat treatment on the magnetic properties of Fe-based nanocrystalline alloys[J].Metallic Functional Materials,2015,22(2):4-6(in Chinese).刘笑闯,李准,崔兴华,等.磁场热处理对铁基纳米晶合金磁性能的影响[J].金属功能材料,2015,22(2):4-6.
[13] 赵凯华,陈熙谋.电磁学[M].北京:高等教育出版社,2011:361-367.
[14] 周洁敏,赵修科.开关电源磁性元件理论及设计[M].北京:北京航空航天大学,2014.
[15] Noh T H,Lee M B,Kim H J,et al.Relationship between crystallization process and magnetic properties of Fe-(Cu-Nb)-Si-B amorphous alloys [J].Journal of Applied Physics,1990,67(9):5568-5570.
[16] Zhou Xiaofeng,Tao Shufen,Liu Zuoquan.DSC analysis on crystallization of Finemet soft magnetic alloy[J].Ansactions of Materials and Heat Treatment,2002,23(3):65-68(in Chinese).周效锋,陶淑芬,刘佐权.关于FINEMET软磁合金晶化处理的DSC分析[J].材料热处理学报,2002,23(3):65-68.
[17] 周欢华.预退火工艺对铁基非晶合金晶化过程放热行为和软磁性能的影响[D].武汉:武汉科技大学,2014.
[18] Li Qing,Li Bo,Zhao Weiwei.Influence of heat-treatment on the high-frequency permeability of Fe-based nano-crystalline ribbon[J].Journal of Magnetic Materials and Devices,2015,46(3):51-53(in Chinese).李青,李博,赵伟伟.热处理对铁基纳米晶薄带高频磁导率的影响[J].磁性材料及器件,2015,46(3):51-53.
[19] Wang Zhi,He Kaiyuan,He Jun,et al.Influence of annealing conditions on magnetic properties of Fe-based nanocrystalline alloy[J].Journal of Tian Jin University,2000,33(4):541-544(in Chinese).王治,何开元,何峻,等.退火条件对Fe基纳米晶合金磁性的影响[J].天津大学学报,2000,33(4):541-544.
[20] Ma Xiaohua,Wang Zhi,Wang Guangjian.Mrcrostructures and high-frequency magnetic properties of nanocrystalline (Fe1-xCox)78.4Nb2.6Si9B9Cu1 soft magnetic alloys[J].Acta Metallurgica Sinica,2007,43(3):281-285(in Chinese).马晓华,王治,王光建.(Fe1-xCox)78.4Nb2.6Si9B9Cu1纳米晶软磁合金的结构与高频磁性[J].金属学报,2007,43(3):281-285.
[21] Guo Shihai,Zhang Yanghuan,Wang Yu,et al.Effects of transverse magnetic heat treatment on the magnetic properties of Fe-based amorphous alloy with high saturation magnetic induction[J].Journal of Magnetic Materials and Devices,2009,40(3):38-40(in Chinese).郭世海,张羊换,王煜,等.横向磁场热处理对高饱和磁感应强度Fe基非晶磁性能的影响[J].磁性材料及器件,2009,40(3):38-40.
[22] Fan X,Zhu F,Wang Q,et al.Effect of magnetic field annealing on microstructure and magnetic properties of FeCuNbSiB nanocrystalline magnetic core with high inductance[J].Applied Microscopy,2017,47(1):29-35.