Double SiC coating on carbon/carbon composites against oxidation by a two-step method

Can Sun, He Jun Li, Qian Gang Fu, Jia Ping Zhang, Han Peng

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

To improve the oxidation resistance of C/C composites, a double SiC protective coating was prepared by a two-step technique. Firstly, the inner SiC layer was prepared by a pack cementation technique, and then an outer uniform and compact SiC coating was obtained by low pressure chemical vapor deposition. The microstructures and phase compositions of the coatings were characterized by SEM, EDS and XRD analyses. Oxidation behaviour of the SiC coated C/C composites was also investigated. It was found that the double SiC coating could protect C/C composites against oxidation at 1773 K in air for 178 h with a mass loss of 1.25%. The coated samples also underwent thermal shocks between 1773 K and room temperature 16 times. The mass loss of the coated C/C composites was only 2.74%. Double SiC layer structures were uniform and dense, and can suppress the generation of thermal stresses, facilitating an excellent anti-oxidation coating.

Original languageEnglish
Pages (from-to)2107-2112
Number of pages6
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Volume23
Issue number7
DOIs
StatePublished - Jul 2013

Keywords

  • carbon/carbon composites
  • coating
  • oxidation
  • SiC

Fingerprint

Dive into the research topics of 'Double SiC coating on carbon/carbon composites against oxidation by a two-step method'. Together they form a unique fingerprint.

Cite this