Effect of interface behavior between particles on properties of pure Al powder compacts by spark plasma sintering

G. Xie, O. Ohashi, T. Yoshioka, M. Song, K. Mitsuishi, H. Yasuda, K. Furuya, T. Noda

    Research output: Contribution to journalArticlepeer-review

    75 Citations (Scopus)

    Abstract

    Pure Al powder was sintered by spark plasma sintering (SPS) process at various sintering temperatures and loading pressures. The density, electrical resistivity, tensile properties and microstructure of powder compacts were investigated. The powder compacts with the similar properties as base aluminum metal was obtained at sintering temperature above 873 K, loading pressure above 23.5 MPa. For the powder compacts with the similar density but with the large difference in the electrical resistivity and tensile properties, the interfaces between Al powder particles were investigated using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). Two types of interfaces, with metal/metal bonding and metal/oxide film layer/metal bonding, were observed in Al powder compacts. The properties of powder compacts were mainly subject to the behavior of oxide film between the powder particles.

    Original languageEnglish
    Pages (from-to)1846-1849
    Number of pages4
    JournalMaterials Transactions
    Volume42
    Issue number9
    DOIs
    Publication statusPublished - 2001

    Keywords

    • Aluminum powder compact
    • Electrical resistivity
    • High resolution transmission electron microscopy
    • Interface
    • Oxide film
    • Spark plasma sintering
    • Tensile properties

    ASJC Scopus subject areas

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

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