TY - JOUR
T1 - In situ monitoring of structural changes in boron carbide under electric fields
AU - Fanchini, Giovanni
AU - Gupta, Varun
AU - Mann, Adrian B.
AU - Chhowalla, Manish
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2008/8
Y1 - 2008/8
N2 - 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.
AB - 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.
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U2 - 10.1111/j.1551-2916.2008.02488.x
DO - 10.1111/j.1551-2916.2008.02488.x
M3 - Article
AN - SCOPUS:49549088316
VL - 91
SP - 2666
EP - 2669
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 8
ER -