Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders

Guoqiang Xie; Osamu Ohashi; Minghui Song; Kazutaka Mitsuishi; Kazuo Furuya

doi:10.1016/j.apsusc.2004.09.025

Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders

Guoqiang Xie, Osamu Ohashi, Minghui Song, Kazutaka Mitsuishi, Kazuo Furuya

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

36 Citations (Scopus)

Abstract

The microstructure of interfaces between powder particles in Al-Mg alloy specimens sintered by pulse electric-current sintering (PECS) process was characterized using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). The crystalline precipitates with nano-size in the interface were observed in all of Al-Mg alloy specimens. The composition was determined to be MgAl ₂ O ₄ or MgO, or both of them, which depended on Mg content in alloy powder and sintering temperature. The precipitates were suggested to contribute to reduction reaction of Mg with oxide films originally covered at powder particles surface.

Original language	English
Pages (from-to)	102-106
Number of pages	5
Journal	Applied Surface Science
Volume	241
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.apsusc.2004.09.025
Publication status	Published - 2005 Feb 28

Keywords

Al-Mg alloy
HRTEM
Oxide film
Pulse electric-current sintering
Reduction reaction

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.apsusc.2004.09.025

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title = "Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders",

abstract = " The microstructure of interfaces between powder particles in Al-Mg alloy specimens sintered by pulse electric-current sintering (PECS) process was characterized using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). The crystalline precipitates with nano-size in the interface were observed in all of Al-Mg alloy specimens. The composition was determined to be MgAl 2 O 4 or MgO, or both of them, which depended on Mg content in alloy powder and sintering temperature. The precipitates were suggested to contribute to reduction reaction of Mg with oxide films originally covered at powder particles surface.",

keywords = "Al-Mg alloy, HRTEM, Oxide film, Pulse electric-current sintering, Reduction reaction",

author = "Guoqiang Xie and Osamu Ohashi and Minghui Song and Kazutaka Mitsuishi and Kazuo Furuya",

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T1 - Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders

AU - Xie, Guoqiang

AU - Ohashi, Osamu

AU - Song, Minghui

AU - Mitsuishi, Kazutaka

AU - Furuya, Kazuo

PY - 2005/2/28

Y1 - 2005/2/28

N2 - The microstructure of interfaces between powder particles in Al-Mg alloy specimens sintered by pulse electric-current sintering (PECS) process was characterized using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). The crystalline precipitates with nano-size in the interface were observed in all of Al-Mg alloy specimens. The composition was determined to be MgAl 2 O 4 or MgO, or both of them, which depended on Mg content in alloy powder and sintering temperature. The precipitates were suggested to contribute to reduction reaction of Mg with oxide films originally covered at powder particles surface.

AB - The microstructure of interfaces between powder particles in Al-Mg alloy specimens sintered by pulse electric-current sintering (PECS) process was characterized using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). The crystalline precipitates with nano-size in the interface were observed in all of Al-Mg alloy specimens. The composition was determined to be MgAl 2 O 4 or MgO, or both of them, which depended on Mg content in alloy powder and sintering temperature. The precipitates were suggested to contribute to reduction reaction of Mg with oxide films originally covered at powder particles surface.

KW - Al-Mg alloy

KW - HRTEM

KW - Oxide film

KW - Pulse electric-current sintering

KW - Reduction reaction

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JO - Applied Surface Science

JF - Applied Surface Science

IS - 1-2 SPEC. ISS.

ER -

Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders

Abstract

Keywords

ASJC Scopus subject areas

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