A mechanistic study on the synthesis of β-Sialon whiskers from coal fly ash

H. Zhao, P. Y. Wang, J. L. Yu, J. Zhang

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Abstract

β-Sialon whiskers were produced at 1420 °C through carbothemal reduction reaction under nitrogen atmosphere using fly ash from coal-fired power plants. The effects of sintering time on the phase formation and morphology of the products were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) techniques. Rod-like β-Sialon whiskers with the diameter of 100-500 nm were successfully formed. With increasing sintering time, bead-like morphology during the growth process of the whiskers was found, and growth mechanism of β-Sialon whiskers was also discussed in detail. The growth mechanism proposed in this study was different from the conventional vapor-liquid-solid (VLS) mechanism.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalMaterials Research Bulletin
Volume65
DOIs
Publication statusPublished - May 2015
Externally publishedYes

Keywords

  • A. Composites
  • A. Nanostructure
  • A. Nitrides
  • B. Chemical synthesis
  • B. Crystal growth

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