Synthesis and thermal stability of nano-crystalline vanadium disilicide

Jianhua Ma, Yunle Gu, Liang Shi, Luyang Chen, Zeheng Yang, Yitai Qian

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    Nano-crystalline vanadium disilicide was successfully synthesized using vanadium tetrachloride and silicon as starting materials via reduction-silication route at 650°C in the molten salt solution of magnesium chloride and sodium chloride in an autoclave. X-ray powder diffraction patterns indicated that the product was hexagonal VSi2 (a=4.572Å, c=6.372Å). Transmission electron microscopy images showed that the particle size of the product was in the range of 40-60nm in diameter. There was a strong absorption peak at 271nm in the UV-Vis absorption spectra. The oxidation of nano-crystalline VSi2 began to proceed at the temperature of 400°C in air. But the product had high thermal oxidation stability below 1000°C. It can be used as an antioxidation coating material.

    Original languageEnglish
    Pages (from-to)281-284
    Number of pages4
    JournalJournal of Alloys and Compounds
    Volume370
    Issue number1-2
    DOIs
    Publication statusPublished - 2004 May 12

    Keywords

    • Chemical synthesis
    • Nano-structures
    • Thermal property
    • Vanadium disilicide
    • X-ray diffraction

    ASJC Scopus subject areas

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

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