Effect of Mg on the sintering of Al-Mg alloy powders by pulse electric-current sintering process

Guoqiang Xie, Osamu Ohashi, Takahiro Sato, Norio Yamaguchi, Minghui Song, Kazutaka Mitsuishi, Kazuo Furuya

    Research output: Contribution to journalArticle

    41 Citations (Scopus)

    Abstract

    Utilization of deoxidization mechanism of magnesium (Mg) is an effective method to remove the oxide films at aluminum (Al) alloy powder surface in pulse electric-current sintering (PECS) process. The continuous amorphous oxide film at Al alloy surface are broken and removed by deoxidization of Mg. Crystalline particles of MgAl2O4 or MgO, or both of them, are formed, which depend on Mg content in Al alloy powder and sintering temperature. After that the metal/metal contact is caused, and solid state sintering of Al alloy powder is facilitated. The electrical resistivity and tensile properties of powder compacts are improved by Mg addition. Based on the analyses of electrical resistivity, tensile properties and microstructures of the sintered specimens, optimum amount of Mg addition to improve the sintering properties of Al powder is determined to be 0.3-2.5 mass%.

    Original languageEnglish
    Pages (from-to)904-909
    Number of pages6
    JournalMaterials Transactions
    Volume45
    Issue number3
    DOIs
    Publication statusPublished - 2004 Mar

    Keywords

    • Aluminium-magnesium alloy
    • Deoxidization
    • Oxide film
    • Pulse electric-current sintering
    • Resistivity
    • Tensile strength

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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  • Cite this

    Xie, G., Ohashi, O., Sato, T., Yamaguchi, N., Song, M., Mitsuishi, K., & Furuya, K. (2004). Effect of Mg on the sintering of Al-Mg alloy powders by pulse electric-current sintering process. Materials Transactions, 45(3), 904-909. https://doi.org/10.2320/matertrans.45.904