Effect of temperature gradient on the erosion behavior of SiC coating for carbon/carbon composites in a combustion environment

Jia Ping Zhang, Qian Gang Fu, Jun Ling Qu

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

SiC coating with a thickness of 50–70 µm was prepared on the surface of C/C composites by in-situ reaction method. The SiC coated C/C composites were then tested in a wind tunnel where a temperature gradient from 200 to 1600 °C could be obtained to investigate their erosion behavior. The results of wind tunnel test indicated that the service life of C/C composites was prolonged from 0.5 to 44 h after applying the SiC coating. After the wind tunnel test, three typical oxidation morphologies, including glassy SiO2 layer, porous SiO2 layer and clusters of honeycomb-like SiO2 grains, were found on the SiC coated C/C composites. With the decrease of oxidation temperature, the amount of glassy SiO2 declined and the thermal stress increased, which induced the cracking followed by the degradation of the SiC coating.

Original languageEnglish
Pages (from-to)18411-18417
Number of pages7
JournalCeramics International
Volume42
Issue number16
DOIs
StatePublished - 1 Dec 2016

Keywords

  • Mechanical property
  • Oxidation behavior
  • SiC coating
  • Temperature gradient
  • Wind tunnel

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