Synthesis of metal-metal oxide (Me-MenOm) nanocomposites by partial reduction and cold sintering

[Display omitted] •MMNCs were obtained by cold sintering of partially reduced oxide nanopowder.•Partially reduced oxide nanoparticles had core(oxide)-shell(metal) structure.•Partial reduction facilitated homogeneous distribution of oxide inclusions.•The low temperature sintering ensured retention of...

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Veröffentlicht in:Materials letters 2020-10, Vol.276, p.128197, Article 128197
Hauptverfasser: Sharipova, Aliya, Slesarenko, Viacheslav, Gutmanas, Elazar
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Sprache:eng
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Zusammenfassung:[Display omitted] •MMNCs were obtained by cold sintering of partially reduced oxide nanopowder.•Partially reduced oxide nanoparticles had core(oxide)-shell(metal) structure.•Partial reduction facilitated homogeneous distribution of oxide inclusions.•The low temperature sintering ensured retention of the nanostructure.•Obtained MMNCs demonstrated enhanced mechanical performance. Metal matrix nanocomposites (MMNCs) require the development of new manufacturing techniques that enable enhanced control over their microstructure and mechanical performance. The approach for MMNC fabrication proposed in this work combines the partial reduction of the oxide nanopowder with the subsequent cold sintering. We show that it is possible to avoid unwanted structural changes such as grain coarsening and inclusion agglomeration. We reveal that a core-shell structure of partially reduced Fe2O3 particles facilitates reliable sintering and enables the fabrication of near-dense MMNCs reinforced by iron oxide nanoparticles. The fabricated composites exhibit a homogeneous distribution of reinforcing oxide inclusions and demonstrate high mechanical strength.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.128197