Thermal-effect study on a carbon-carbon composite using synchrotron x-ray measurements & molecular dynamics simulation

E-Wen Huang*, Chung Kai Chang, Wen Jay Lee, Soo Yeol Lee, Jun Wei Qiao, Chung Hao Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Carbon-carbon composites are deemed as candidate materials for application in very high temperature reactors. In a very high temperature reactor, carbon-carbon composite materials would experience severe environmental impacts from high temperatures. As a result, we applied non-destructive ex-situ diffraction experiments to investigate the microstructure changes of the carbon-carbon composite materials experiencing different temperatures. In this study, the samples were prepared in a format of a three-dimensional pitch-based carbon-carbon composite. The samples were heated to 500 (°C), 700 (°C), and 900 (°C) for 2 minutes, respectively. In order to understand the temperature effect on carbon-carbon composite, we facilitated the high penetration of the synchrotron X-ray diffraction at National Synchrotron Radiation Research Center to examine the evolution of microstructures subjected to heat treatment. The results show that the lattice parameters of a-axis and c-axis evolve upon heating. The molecular dynamics simulation results suggest that the early-stage rearrangement is originated from the release of the defects.

Original languageEnglish
Title of host publicationMechanical Stress Evaluation by Neutrons and Synchrotron Radiation VII
Pages35-39
Number of pages5
DOIs
StatePublished - 7 Mar 2014
Event7th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2013 - Sydney, NSW, Australia
Duration: 10 Sep 201312 Sep 2013

Publication series

NameMaterials Science Forum
Volume777
ISSN (Print)0255-5476

Conference

Conference7th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2013
CountryAustralia
CitySydney, NSW
Period10/09/1312/09/13

Keywords

  • High temperature
  • Molecular-dynamics simulation
  • Nuclear-grade carbon composite
  • Synchrotron x-ray diffraction

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