Magnetic Properties of Nanocrystalline Powder Cores Using Mechanically Crushed Powders  

作　　者：Chun-bo HUANG Tian-cheng LIU Xiang-yue WANG Cao-wei LU De-ren LI Zhi-chao LU 

机构地区：[1]China Iron and Steel Research Institute Group [2]R&D Center of Advanced Technology and Materials Co.,Ltd.

出　　处：《Journal of Iron and Steel Research International》2014年第3期348-351,共4页

基　　金：Sponsored by National High-tech Research and Development Program of China(2012AA030301)

摘　　要：Toroidal shape FeCuNbSiB nanocrystalline alloy powder cores were prepared by cold pressing using me- chanically crushed and ball-milled powders, respectively. The morphologies and their effects on the magnetic proper- ties of the compacted cores were investigated. Compared with ball-milled powders, mechanically crushed ones have more regular shapes and rounder edges, which lead to better inter-particle insulation. FeCuNbSiB nanocrystalline al- loy powder cores fabricated from mechanically crushed powders exhibit remarkably lower core loss of about 248.2 kW/m3 at 100 kHz for maximum flux density Bm 0.1 T, and more stable permeability up to 10 MHz. Moreover, the dc-bias property could be improved significantly using mechanically crushed powders.Toroidal shape FeCuNbSiB nanocrystalline alloy powder cores were prepared by cold pressing using me- chanically crushed and ball-milled powders, respectively. The morphologies and their effects on the magnetic proper- ties of the compacted cores were investigated. Compared with ball-milled powders, mechanically crushed ones have more regular shapes and rounder edges, which lead to better inter-particle insulation. FeCuNbSiB nanocrystalline al- loy powder cores fabricated from mechanically crushed powders exhibit remarkably lower core loss of about 248.2 kW/m3 at 100 kHz for maximum flux density Bm 0.1 T, and more stable permeability up to 10 MHz. Moreover, the dc-bias property could be improved significantly using mechanically crushed powders.

关 键 词：nanocrystaUine powder core MORPHOLOGY core loss high frequency property 

分 类 号：TB383.3[一般工业技术—材料科学与工程]