A single-step catalyst-free CVD technique has been used for producing an array of mullite nanofibers covered by several layers of graphene-like nanostructures. The hybrid fibers have been then exploited as electroconductive fillers to alumina and yttria stabilized zirconia matrixes. The electrically conductive additives do not substantially change the mechanical properties. However, the resistivity of the composites undergoes a considerable drop turning the dielectric oxides into conductive composites by addition of 2 vol% of fillers which corresponds to 0.2 and 0.38 vol% of carbon content in alumina and zirconia, respectively. Three-dimensional Monte Carlo simulation of systems, exploiting the critical path based tunnelling-percolation model, gives a tunnelling length-scale of 2.23 nm for the materials under consideration.

Original languageEnglish (US)
Title of host publicationCeramic Engineering and Science Proceedings
EditorsMihails Kusnezoff, Zhengyi Fu, Tatsuki Ohji, Jerry LaSalvia, Peter Mechnich, Dietmar Koch, Narottam Bansal, Palani Balaya, Jonathan Salem
PublisherAmerican Ceramic Society
Number of pages8
ISBN (Electronic)9781119519645, 9781119543268, 9781119543305
StatePublished - 2019
Event42nd International Conference on Advanced Ceramics and Composites, ICACC 2018 - Daytona Beach, United States
Duration: Jan 21 2018Jan 26 2018

Publication series

NameCeramic Engineering and Science Proceedings
ISSN (Print)0196-6219


Conference42nd International Conference on Advanced Ceramics and Composites, ICACC 2018
Country/TerritoryUnited States
CityDaytona Beach

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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