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 journalArticle

    34 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 languageEnglish
    Pages (from-to)102-106
    Number of pages5
    JournalApplied Surface Science
    Volume241
    Issue number1-2 SPEC. ISS.
    DOIs
    Publication statusPublished - 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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