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FeCuNbSiB納米晶軟磁粉芯的制備和磁性能
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國家自然科學(xué)基金資助（NSFC-51102213）


Fabrication and Magnetic Properties of FINEMET Alloy Powder Cores
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    摘要:

    采用熔體快淬法制備了Fe73.5Cu1Nb3Si13.5B9 (FINEMET, at%) 非晶薄帶，通過高能球磨制成磁粉，篩分后的磁粉在0.2%~1.0%（質(zhì)量分?jǐn)?shù)）的磷酸溶液中鈍化，并與0.4%的環(huán)氧樹脂混合，于1.64~1.96 GPa下壓制成磁環(huán)。磁環(huán)經(jīng)過500 ℃去應(yīng)力退火處理，在非晶基體表面析出晶粒大小為14.3 nm的納米晶α-Fe（Si）相。通過去應(yīng)力過程和雙相結(jié)構(gòu)的協(xié)同作用，納米晶軟磁粉芯表現(xiàn)出優(yōu)良的磁性能，在100 kHz和0.1 T下的損耗僅為583 mW/cm3。

    Abstract:

    Melt-spun amorphous Fe73.5Cu1Nb3Si13.5B9 (FINEMET, at%) ribbons were ball-milled to obtain powder. The powder was sieved and then passivated in 0.2~1.0% phosphoric acid solution to form a well-coated passivator layer, followed by cold compaction under the pressure of 1.64~1.96 GPa to prepare toroidal magnetic cores. The powder cores were annealed at 400~600 oC to relieve the internal stress and to optimize the crystalline grain size. After annealed at 500 oC for 1 h, α-Fe(Si) crystallites with an average grain size of 14.3 nm were embedded in the amorphous matrix. Combined with the insulation of each powder and the two-phase structure, the powder core exhibits excellent magnetic properties.

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熊亞東,林 坤,嚴(yán) 密,姜銀珠. FeCuNbSiB納米晶軟磁粉芯的制備和磁性能[J].稀有金屬材料與工程,2014,43(8):1951~1954.[Xiong Yadong, Lin Kun, Yan Mi, Jiang Yinzhu. Fabrication and Magnetic Properties of FINEMET Alloy Powder Cores[J]. Rare Metal Materials and Engineering,2014,43(8):1951~1954.]
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  • 收稿日期:2013-08-12
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  • 在線發(fā)布日期: 2015-01-04
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