Abstract
The permissible disclination structures of carbonaceous mesophase spherules with tangential boundary conditions were analysed theoretically. Besides the well-known Brooks-Taylor spherules, we observed during experiment the equilibrium carbonaceous mesophase spherules with symmetric configurations of 5 and 6 disclinations which are in close agreement with theoretical results. These spherules have been found to be formed and stabilized in coalescence of two or more mesophase spherules with a Brooks-Taylor structure. A thorough study has been made of the dynamics of the coalescence of carbonaceous mesophase spherules and disclination reactions in them, including the annihilation of disclinations of different sign. The rate of change of distance r between the disclination nuclei was shown to be r 2 = a ( t− t c ), where t c is the time of disclination annihilation. It is known that the bulk carbonaceous mesophase contains primarily wedge disclinations of strength ± 1 2 , ± 1 . We have found that the disclinations of greater strengths, namely, + 3 2 and +2 may also exist. The effect of small impurity particles and gaseous bubbles on the stabilization of these possible but energetically less favorable disclinations in the carbonaceous mesophase is discussed.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
