Microstructure and phase transformations of silica glass and vanadium oxide by severe plastic deformation via high-pressure torsion straining

Kaveh Edalati, Ikuro Fujita, Xavier Sauvage, Makoto Arita, Zenji Horita

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Plastic deformation of oxides is generally difficult due to their hard and brittle nature resulting from their covalent or ionic bondings. In this study, severe plastic deformation was successfully introduced in SiO2 glass and crystalline VO2 by high-pressure torsion (HPT). SiO2 glass transformed to a denser amorphous phase without showing any crystallization after processing in the temperature range of 300–723 K. Crystalline VO2 transformed from the coarse-grained monoclinic phase to a nanograined triclinic phase with insulating electrical properties by plastic strain effect. These findings indicate the potential of HPT process in tuning the crystal structure of optical and electrical oxides.

    Original languageEnglish
    Pages (from-to)394-398
    Number of pages5
    JournalJournal of Alloys and Compounds
    Volume779
    DOIs
    Publication statusPublished - Mar 30 2019

    All Science Journal Classification (ASJC) codes

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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