Improving the mechanical strength of carbon–carbon composites by oxidative stabilization

Ji Hong Kim, A. Young Jo, Yun Jeong Choi, Ki Bong Lee, Ji Sun Im, Byong Chol Bai

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Carbon/carbon composite has superior properties, so it has been expected to use various industrial fields. However, low mechanical strength (than conventional structural materials) works as a hurdle, so the use of oxidative stabilization to improve the mechanical strength of carbon/carbon composites was studied. The oxidation process was performed at 220–350 °C based on thermogravimetric analysis (TGA). The compressive strength of the oxidized sample at 290 °C was 212 MPa, which is 2.5 times greater than that of the non-oxidized sample (84 MPa). However, the oxidation temperature of more than 290 °C decreased the compressive strength (199 MPa at 350 °C). This tendency was in accordance with the TGA and X-ray photoelectron spectroscopy (XPS) results. The effect of oxidative stabilization can be explained by two factors: the polymerization of the used binder pitch by the crosslinking effect by induced oxygen and improvement of the affinity between the coke and binder pitch.

Original languageEnglish
Pages (from-to)16513-16521
Number of pages9
JournalJournal of Materials Research and Technology
Volume9
Issue number6
DOIs
Publication statusPublished - 2020 Nov 1

Keywords

  • Carbon–carbon composite
  • Coke/pitch affinity
  • Mechanical strength
  • Oxidative stabilization
  • Oxygen crosslinking

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

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