In situ monitoring of structural changes in boron carbide under electric fields

Giovanni Fanchini, Varun Gupta, Adrian B. Mann, Manish Chhowalla

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In situ monitoring of the transformation of B4C under electric field using Raman spectroscopy is reported. Application of electric fields up to 5000 V/cm leads to local segregation of carbon, indicated by the appearance of Raman D and G peaks. At low electric fields (<3000 V/cm) the segregated carbon is amorphous, while at higher fields aromatic sp2 clustering is observed. Electrical measurements as a function of temperature are used to complement the Raman measurements. The results demonstrate that it is possible to induce transformations in boron carbide using electric fields that are comparable with those obtained under shock and nanoindentation.

Original languageEnglish
Pages (from-to)2666-2669
Number of pages4
JournalJournal of the American Ceramic Society
Issue number8
Publication statusPublished - Aug 1 2008


ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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