Reactive sintering of tungsten-doped high strength ZrB2-SiC porous ceramics using metastable precursors

Bin Zhao, Yanshan Jiang, Biyun Yang, Tingyu Wang, Yongzhen Hu, Dongfeng Sun, Ruixing Li, Shu Yin, Junping Li, Zhihai Feng, Tsugio Sato

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Tungsten-doped porous ZrB2-20 vol.% SiC specimens with a high strength skeleton were fabricated by reactive sintering using metastable reactants, i.e., as-synthesized amorphous hydrous ZrO2-WO 3/ZrO2, amorphous boron, nanocarbon, and β-SiC. Doping with tungsten clearly promoted sintering and improved mechanical properties; the optimum tungsten concentration to obtain high mechanical properties was investigated. A single-phase solid solution (Zr,W)B2 was formed in the specimens with tungsten. We suggest that sintering was promoted by self-accelerated diffusion owing to the formation of point defects caused by doping with tungsten. The improvement of mechanical properties could be attributed to solid solution strengthening.

    Original languageEnglish
    Pages (from-to)19-23
    Number of pages5
    JournalMaterials Research Bulletin
    Volume51
    DOIs
    Publication statusPublished - 2014 Mar

    Keywords

    • A. Amorphous materials
    • A. Ceramics
    • A. Microporous materials
    • D. Defects
    • D. Mechanical properties

    ASJC Scopus subject areas

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

    Fingerprint

    Dive into the research topics of 'Reactive sintering of tungsten-doped high strength ZrB2-SiC porous ceramics using metastable precursors'. Together they form a unique fingerprint.

    Cite this