Mechanochemical Synthesis of Cu–Al Alloyed Powders and Their Consolidation by Spark Plasma Sintering

T. F. Grigoreva, S. A. Petrova, S. A. Kovaleva, D. V. Dudina, I. S. Batraev, T. Yu Kiseleva, S. I. Zholudev, S. V. Vosmerikov, E. T. Devyatkina, T. A. Udalova, S. N. Polyakov, N. Z. Lyakhov

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The mechanochemically synthesized Cu–20 wt % Al alloys are studied by the X-ray diffraction analysis and scanning electron microscopy. It is shown that, after 20 min of mechanical activation, the single-phase intermetallic compound Cu9Al4 with crystallites ~3 nm in size, low microstrains (~0.03%), and particle size in the range from 0.2–0.4 to 2–4 μm is formed. The morphological characteristics of the solid solution of aluminum in copper, which has been mechanochemically synthesized from the Cu–10 wt % Al alloy, are studied. It is demonstrated that the solid solution is composed of platelike particles 10–50 μm in planar size and 2–10 μm in thickness. The scanning electron and optical microscopy data show that the Cu(Al) solid solution produced by the spark plasma sintering at 700°С are characterized by the low residual porosity (<0.5%). The Vickers hardness is 290 ± 30 HV.

    Original languageEnglish
    Pages (from-to)681-687
    Number of pages7
    JournalPhysics of Metals and Metallography
    Volume122
    Issue number7
    DOIs
    Publication statusPublished - Jul 2021

    Keywords

    • CuAl intermetallics
    • mechanochemical synthesis
    • scanning electron microscopy
    • solid solution of aluminum in copper
    • spark plasma sintering
    • X-ray diffraction analysis

    OECD FOS+WOS

    • 2.05.PZ METALLURGY & METALLURGICAL ENGINEERING

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