Behavior of oxide film at the interface between particles in sintered Al powders by pulse electric-current sintering

Guoqiang Xie, Osamu Ohashi, Minghui Song, Kazuo Furuya, Tetsuji Noda

    Research output: Contribution to journalArticlepeer-review

    76 Citations (Scopus)

    Abstract

    The microstructure of the bonding interfaces between particles in aluminum (Al) powder sintered specimens by the pulse electric-current sintering (PECS) process was observed, using conventional transmission electron microscopy (CTEM) and high-resolution transmission electron microscopy (HRTEM). The behavior of oxide film at the interface between Al particles and its effect on properties of the sintered specimens were investigated. The results showed there were two kinds of bonding interfaces in the sintered specimens, namely, the direct metal/metal bonding and the metal/oxide film layer/metal bonding interface. By increasing the fraction of the direct metal/metal bonding interfaces, the tensile strength of the sintered specimens increased, and the electrical resistivity decreased. By increasing the loading pressure at higher sintering temperatures or increasing the sintering temperature under loading pressure, the breakdown of oxide film was promoted. The broken oxide film debris was dispersed in aluminum metal near the bonding interfaces between particles.

    Original languageEnglish
    Pages (from-to)699-703
    Number of pages5
    JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    Volume34 A
    Issue number3
    DOIs
    Publication statusPublished - 2003 Mar

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys

    Fingerprint Dive into the research topics of 'Behavior of oxide film at the interface between particles in sintered Al powders by pulse electric-current sintering'. Together they form a unique fingerprint.

    Cite this