Characterization of iron nitride powders formed by mechanical alloying and atmospheric heat treatment techniques

Chung Kwei Lin; Giin Shan Chen; Jium Shyong Chen; Tsung Shune Chin; Pee Yew Lee

doi:10.1080/02533839.2001.9670671

Characterization of iron nitride powders formed by mechanical alloying and atmospheric heat treatment techniques

Chung Kwei Lin
, Giin Shan Chen
, Jium Shyong Chen
, Tsung Shune Chin
, Pee Yew Lee

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

3 Citations (Scopus)

Abstract

Iron nitrides were manufactured by mechanical alloying of Fe_2.33N and Fe powder mixtures at starting compositions of Fe₁₂N₂ and Fe₁₆N₂ and annealed in air at 200 and 240°C. It was found that the supersaturated nanocrystalline α-Fe solid solution phase was produced after MA, and iron nitrides were formed after heat treatment. The saturation magnetization (σ) of the heat-treated powders is higher than those of the as-milled powders. The σ values for the specimens heat treated at 200°C are higher than those heat treated at 240°C, and the highest value among all of the samples is 218 e.m.u./g which is obtained by annealing of as-milled Fe₁₂N₂ powders in air at 200°C for 6 hours. The possible existence of the α"-Fe₁₆N₂ phase is responsible for the high saturation magnetization in mechanically alloyed Fe₁₆N₂ and Fe₁₂N₂ powders.

Original language	English
Pages (from-to)	753-760
Number of pages	8
Journal	Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers
Volume	24
Issue number	6
DOIs	https://doi.org/10.1080/02533839.2001.9670671
Publication status	Published - 2001
Externally published	Yes

Keywords

Heat treatment
Iron nitrides
Mechanical alloying
Saturation magnetization

ASJC Scopus subject areas

General Engineering

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10.1080/02533839.2001.9670671

Cite this

@article{2409132cf6804f2e9a4ecb032a5bab55,

title = "Characterization of iron nitride powders formed by mechanical alloying and atmospheric heat treatment techniques",

abstract = "Iron nitrides were manufactured by mechanical alloying of Fe2.33N and Fe powder mixtures at starting compositions of Fe12N2 and Fe16N2 and annealed in air at 200 and 240°C. It was found that the supersaturated nanocrystalline α-Fe solid solution phase was produced after MA, and iron nitrides were formed after heat treatment. The saturation magnetization (σ) of the heat-treated powders is higher than those of the as-milled powders. The σ values for the specimens heat treated at 200°C are higher than those heat treated at 240°C, and the highest value among all of the samples is 218 e.m.u./g which is obtained by annealing of as-milled Fe12N2 powders in air at 200°C for 6 hours. The possible existence of the α{"}-Fe16N2 phase is responsible for the high saturation magnetization in mechanically alloyed Fe16N2 and Fe12N2 powders.",

keywords = "Heat treatment, Iron nitrides, Mechanical alloying, Saturation magnetization",

author = "Lin, \{Chung Kwei\} and Chen, \{Giin Shan\} and Chen, \{Jium Shyong\} and Chin, \{Tsung Shune\} and Lee, \{Pee Yew\}",

year = "2001",

doi = "10.1080/02533839.2001.9670671",

language = "English",

volume = "24",

pages = "753--760",

journal = "Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers",

issn = "0253-3839",

publisher = "Taylor and Francis Ltd.",

number = "6",

}

TY - JOUR

T1 - Characterization of iron nitride powders formed by mechanical alloying and atmospheric heat treatment techniques

AU - Lin, Chung Kwei

AU - Chen, Giin Shan

AU - Chen, Jium Shyong

AU - Chin, Tsung Shune

AU - Lee, Pee Yew

PY - 2001

Y1 - 2001

N2 - Iron nitrides were manufactured by mechanical alloying of Fe2.33N and Fe powder mixtures at starting compositions of Fe12N2 and Fe16N2 and annealed in air at 200 and 240°C. It was found that the supersaturated nanocrystalline α-Fe solid solution phase was produced after MA, and iron nitrides were formed after heat treatment. The saturation magnetization (σ) of the heat-treated powders is higher than those of the as-milled powders. The σ values for the specimens heat treated at 200°C are higher than those heat treated at 240°C, and the highest value among all of the samples is 218 e.m.u./g which is obtained by annealing of as-milled Fe12N2 powders in air at 200°C for 6 hours. The possible existence of the α"-Fe16N2 phase is responsible for the high saturation magnetization in mechanically alloyed Fe16N2 and Fe12N2 powders.

AB - Iron nitrides were manufactured by mechanical alloying of Fe2.33N and Fe powder mixtures at starting compositions of Fe12N2 and Fe16N2 and annealed in air at 200 and 240°C. It was found that the supersaturated nanocrystalline α-Fe solid solution phase was produced after MA, and iron nitrides were formed after heat treatment. The saturation magnetization (σ) of the heat-treated powders is higher than those of the as-milled powders. The σ values for the specimens heat treated at 200°C are higher than those heat treated at 240°C, and the highest value among all of the samples is 218 e.m.u./g which is obtained by annealing of as-milled Fe12N2 powders in air at 200°C for 6 hours. The possible existence of the α"-Fe16N2 phase is responsible for the high saturation magnetization in mechanically alloyed Fe16N2 and Fe12N2 powders.

KW - Heat treatment

KW - Iron nitrides

KW - Mechanical alloying

KW - Saturation magnetization

UR - https://www.scopus.com/pages/publications/0035518253

UR - https://www.scopus.com/pages/publications/0035518253#tab=citedBy

U2 - 10.1080/02533839.2001.9670671

DO - 10.1080/02533839.2001.9670671

M3 - Article

AN - SCOPUS:0035518253

SN - 0253-3839

VL - 24

SP - 753

EP - 760

JO - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers

JF - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers

IS - 6

ER -

Characterization of iron nitride powders formed by mechanical alloying and atmospheric heat treatment techniques

Abstract

Keywords

ASJC Scopus subject areas

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