Distribution patterns of different carbon nanostructures in silicon nitride composites

Orsolya Tapasztó, Márton Markó, Csaba Balázsi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The dispersion properties of single- and multi-walled carbon nanotubes as well as mechanically exfoliated few layer graphene flakes within the silicon nitride ceramic matrix have been investigated. Small angle neutron scattering experiments have been employed to gain information on the dispersion of the nano-scale carbon fillers throughout the entire volume of the samples. The neutron scattering data combined with scanning electron microscopy revealed strikingly different distribution patterns for different types of carbon nanostructures. The scattering intensities for single wall carbon nanotubes (SWCNTs) reveal a decay exponent characteristic to surface fractals, which indicate that the predominant part of nanotubes can be found in loose networks wrapping the grains of the polycrystalline matrix. By contrast, multi wall carbon nanotubes (MWCNTs) were found to be present mainly in the form of bulk aggregate structures, while few-layer graphene (FLG) flakes have been individually dispersed within the host matrix, under the very same preparation and processing conditions.

Original languageEnglish
Pages (from-to)8775-8778
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number11
DOIs
Publication statusPublished - Nov 1 2012

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Keywords

  • Carbon nanotubes
  • Composites
  • Dispersion
  • Graphene
  • Silicon nitride
  • Small angle neutron scattering

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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