Microstructure and magnetic properties of nanosized Fe-Co alloy powders synthesized by mechanochemical and mechanical alloying process

Baek Hee Lee; Bong Su Ahn; Dae Gun Kim; Sung Tag Oh; Hyeongtag Jeon; Jinho Ahn; Young Do Kim

doi:10.1016/S0167-577X(02)00938-2

Microstructure and magnetic properties of nanosized Fe-Co alloy powders synthesized by mechanochemical and mechanical alloying process

Baek Hee Lee, Bong Su Ahn, Dae Gun Kim, Sung Tag Oh, Hyeongtag Jeon, Jinho Ahn, Young Do Kim

Dept. of Materials Science & Engineering

Hanyang University

Research output: Contribution to journal › Article › peer-review

79 Scopus citations

Abstract

An optimum route to synthesize nanosized Fe-Co alloy powder with enhanced magnetic properties was investigated. Two methods of mechanical alloying (MA) and mechanochemical alloying (MCA) for developing a nanosized alloy powder were compared on the basis of the resulting microstructural characteristics and magnetic properties. The alloy powder, synthesized by MCA process with ball milling and hydrogen reduction using Fe₂O₃ and Co₃O₄ powders, showed ordered BCC structure with the grain size of 40 nm. Also, this powder exhibited low coercivity of 43 Oe and good permeability compared with MA powder. Enhanced magnetic properties of the MCA powder were explained by the formation of ordered structure and relaxation of internal strain.

Original language	English
Pages (from-to)	1103-1107
Number of pages	5
Journal	Materials Letters
Volume	57
Issue number	5-6
DOIs	https://doi.org/10.1016/S0167-577X(02)00938-2
State	Published - Jan 2003

Keywords

Fe-Co alloy
Hydrogen reduction
Magnetic materials
Microstructure
Nanomaterials
Powder technology

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10.1016/S0167-577X(02)00938-2

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title = "Microstructure and magnetic properties of nanosized Fe-Co alloy powders synthesized by mechanochemical and mechanical alloying process",

abstract = "An optimum route to synthesize nanosized Fe-Co alloy powder with enhanced magnetic properties was investigated. Two methods of mechanical alloying (MA) and mechanochemical alloying (MCA) for developing a nanosized alloy powder were compared on the basis of the resulting microstructural characteristics and magnetic properties. The alloy powder, synthesized by MCA process with ball milling and hydrogen reduction using Fe2O3 and Co3O4 powders, showed ordered BCC structure with the grain size of 40 nm. Also, this powder exhibited low coercivity of 43 Oe and good permeability compared with MA powder. Enhanced magnetic properties of the MCA powder were explained by the formation of ordered structure and relaxation of internal strain.",

keywords = "Fe-Co alloy, Hydrogen reduction, Magnetic materials, Microstructure, Nanomaterials, Powder technology",

author = "Lee, \{Baek Hee\} and Ahn, \{Bong Su\} and Kim, \{Dae Gun\} and Oh, \{Sung Tag\} and Hyeongtag Jeon and Jinho Ahn and Kim, \{Young Do\}",

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T1 - Microstructure and magnetic properties of nanosized Fe-Co alloy powders synthesized by mechanochemical and mechanical alloying process

AU - Lee, Baek Hee

AU - Ahn, Bong Su

AU - Kim, Dae Gun

AU - Oh, Sung Tag

AU - Jeon, Hyeongtag

AU - Ahn, Jinho

AU - Kim, Young Do

PY - 2003/1

Y1 - 2003/1

N2 - An optimum route to synthesize nanosized Fe-Co alloy powder with enhanced magnetic properties was investigated. Two methods of mechanical alloying (MA) and mechanochemical alloying (MCA) for developing a nanosized alloy powder were compared on the basis of the resulting microstructural characteristics and magnetic properties. The alloy powder, synthesized by MCA process with ball milling and hydrogen reduction using Fe2O3 and Co3O4 powders, showed ordered BCC structure with the grain size of 40 nm. Also, this powder exhibited low coercivity of 43 Oe and good permeability compared with MA powder. Enhanced magnetic properties of the MCA powder were explained by the formation of ordered structure and relaxation of internal strain.

AB - An optimum route to synthesize nanosized Fe-Co alloy powder with enhanced magnetic properties was investigated. Two methods of mechanical alloying (MA) and mechanochemical alloying (MCA) for developing a nanosized alloy powder were compared on the basis of the resulting microstructural characteristics and magnetic properties. The alloy powder, synthesized by MCA process with ball milling and hydrogen reduction using Fe2O3 and Co3O4 powders, showed ordered BCC structure with the grain size of 40 nm. Also, this powder exhibited low coercivity of 43 Oe and good permeability compared with MA powder. Enhanced magnetic properties of the MCA powder were explained by the formation of ordered structure and relaxation of internal strain.

KW - Fe-Co alloy

KW - Hydrogen reduction

KW - Magnetic materials

KW - Microstructure

KW - Nanomaterials

KW - Powder technology

UR - https://www.scopus.com/pages/publications/0037216225

U2 - 10.1016/S0167-577X(02)00938-2

DO - 10.1016/S0167-577X(02)00938-2

M3 - Article

AN - SCOPUS:0037216225

SN - 0167-577X

VL - 57

SP - 1103

EP - 1107

JO - Materials Letters

JF - Materials Letters

IS - 5-6

ER -

Microstructure and magnetic properties of nanosized Fe-Co alloy powders synthesized by mechanochemical and mechanical alloying process

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Keywords

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