A C/SiC graded coating on C/C composites by LPCVD in the methyltrichlorosilane/hydrogen system

Zibo He, Hejun Li, Xiaohong Shi

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

Abstract

In order to improve the anti-oxidation of C/C composites, a C/SiC functionally graded coating for C/C composites was prepared by low pressure chemical vapor deposition (LPCVD) using methyltrichlorosilane (MTS, CH 3SiCl3) and H2 as precursors. The relative amount of C and SiC in coatings was varied by controlling the input ratio of H2 to MTS. The phase composition and morphology were examined by scanning electron microscope (SEM) and X-ray diffraction (XRD), and the content distribution of C and SiC phases were investigated by energy dispersive spectroscopy (EDS). The isothermal oxidation test was evaluated at 900°C and 1500°C respectively. The results showed that the as-obtained coatings were possessed of a dense and uniform structure, and the SiC content in coatings increased with an increment of the molar ratio of H2 to MTS. The C/SiC coating had a good oxidation resistance for C/C composites.

Original languageEnglish
Title of host publicationInorganic Thin Films and Coatings
PublisherTrans Tech Publications Ltd
Pages32-35
Number of pages4
ISBN (Print)9783037855669
DOIs
StatePublished - 2013
Event2012 Workshop on Inorganic Thin Films and Coatings - Guilin, China
Duration: 16 Jul 201218 Jul 2012

Publication series

NameKey Engineering Materials
Volume537
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference2012 Workshop on Inorganic Thin Films and Coatings
Country/TerritoryChina
CityGuilin
Period16/07/1218/07/12

Keywords

  • C/SiC
  • Graded coating
  • LPCVD
  • Oxidation resistance

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