Microforging Effect on the Microstructure and Magnetic Properties of FeSiB-based Nanoflakes  

作　　者：Wooseung Kang 

机构地区：[1]Department of Metallurgical & Materials Engineering, INHA Technical College, 253 Yonghyun-Dong, Nam-Gu, Incheon 402-752, South Korea

出　　处：《Journal of Materials Science & Technology》2012年第4期303-307,共5页材料科学技术（英文版）

基　　金：supported by INHA Technical College under a 2010-Research Grant

摘　　要：The effect of microforging on the processing of nanocrystalline FeSiB alloy flakes was studied in terms of microstructure and magnetic properties. The flakes microforged from amorphous precursor showed submicron thicknesses with the crystal size of about 15 nrn. The crystallite size during microforging was primarily determined by plastic deformation rather than fracturing and agglomeration. Unlike the general trend of coercivity reduction with annealing, the coercivity of the nanocrystalline flakes was slightly increased with increasing annealing temperature, which can be explained with the diffusion anisotropy of the magnetic moments resulting from the formation of Fe-atoms pairs. The magnetic rernanence （Mr） of the planar nanocrystalline flakes was measured to be about 26% of the saturation magnetization （Ms）, a significant increase from 2% of the initial amorphous precursor.The effect of microforging on the processing of nanocrystalline FeSiB alloy flakes was studied in terms of microstructure and magnetic properties. The flakes microforged from amorphous precursor showed submicron thicknesses with the crystal size of about 15 nrn. The crystallite size during microforging was primarily determined by plastic deformation rather than fracturing and agglomeration. Unlike the general trend of coercivity reduction with annealing, the coercivity of the nanocrystalline flakes was slightly increased with increasing annealing temperature, which can be explained with the diffusion anisotropy of the magnetic moments resulting from the formation of Fe-atoms pairs. The magnetic rernanence （Mr） of the planar nanocrystalline flakes was measured to be about 26% of the saturation magnetization （Ms）, a significant increase from 2% of the initial amorphous precursor.

关 键 词：Microforging NANOFLAKES Submicron thickness Magnetic properties 

分 类 号：TB383.1[一般工业技术—材料科学与工程]