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Magnetic Properties of Nanocrystalline Powder Cores Fabricated by Mechanically Crushed Powders |
Chun-bo HUANG1,2,Tian-cheng LIU1,2,Xiang-yue WANG1,2,Cao-wei LU1,2,De-ren LI1,2,Zhi-chao LU1,2 |
1. China Iron and Steel Research Institute Group, Beijing 100081, China 2. Advanced Technology and Materials Co., Ltd., Beijing 100081, China |
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Abstract Fe73.5Cu1Nb3Si15.5B7 nanocrystalline powder cores with different particle sizes ranging from 10 to 125 ��m were fabricated by cold-pressing techniques. The cores exhibited increased core loss Pcv and decreased initial permeability ��i with addition of fine powders below 50 ��m in size, and the content should be less than 40 mass%. It was thought to be closely related to the high coercive force Hc due to the stresses generated during the crushing process and high demagnetization fields of small powders. Furthermore, modifying the alloy compositions by adding defined amount of Ni could improve the soft magnetic properties, including superior characteristics of permeability under high direct current (DC) bias field and comparable low core loss at high frequency.
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Received: 04 July 2013
Published: 05 January 2015
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Fund:National Outstanding Youth Science Foundation of China |
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[1] |
Chun-bo HUANG,,Tian-cheng LIU,,Xiang-yue WANG,,Cao-wei LU,,De-ren LI,,Zhi-chao LU,. Magnetic Properties of Nanocrystalline Powder Cores Using Mechanically Crushed Powders[J]. Chinese Journal of Iron and Steel, 2014, 21(3): 348-351. |
[2] |
Xiang-yue WANG,,Zhi-chao LU,,Cao-wei LU,,Guang-min LI,De-ren LI,. Magnetic Properties of FeSiBC Amorphous Alloy Powder Cores Using Mechanical-crushed Powder[J]. Chinese Journal of Iron and Steel, 2014, 21(11): 1055-1058. |
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