AN Yb2Si2O7 oxidation resistance coating for c/c composites by supersonic plasma spray

Lingjun Guo, Minna Han, Hejun Li, Kezhi Li, Qiangang Fu

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

2 Scopus citations

Abstract

An efficient glass coating was prepared on the surface of SiC coated C/C composites by supersonic plasma spray to prevent them from oxidation at 1873 K. The structure of the as-obtained coating was characterized by X-ray diffraction, scanning electron microscopy and isothermal oxidation test at 1873 K in air, respectively. Results show that the achieved Yb2Si2O 7 outer coating was dense and it was bonded well with the SiC inner layer such that the oxidation protective ability and the thermal shock resistance were improved. After oxidation in air at 1873 K for 328 h and thermal cycling between 1873 K and room temperature for 17 times, the mass gain rate of the coated sample was only 0.28%. A dense layer about 5 μm between the SiC inner coating and the Yb2Si2O7 outer coating was in favor of the enhancement of the oxidation resistance of the SiC/Yb 2Si2O7 coating for C/C composites.

Original languageEnglish
Title of host publicationAdvanced Ceramic Coatings and Materials for Extreme Environments - A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, ICACC
PublisherAmerican Ceramic Society
Pages85-90
Number of pages6
Edition3
ISBN (Print)9781118059883
DOIs
StatePublished - 2011
EventAdvanced Ceramic Coatings and Materials for Extreme Environments - 35th International Conference on Advanced Ceramics and Composites, ICACC - Daytona Beach, FL, United States
Duration: 23 Jan 201128 Jan 2011

Publication series

NameCeramic Engineering and Science Proceedings
Number3
Volume32
ISSN (Print)0196-6219

Conference

ConferenceAdvanced Ceramic Coatings and Materials for Extreme Environments - 35th International Conference on Advanced Ceramics and Composites, ICACC
Country/TerritoryUnited States
CityDaytona Beach, FL
Period23/01/1128/01/11

Keywords

  • C/C composites
  • Microstructure
  • Oxidation resistance coating
  • Supersonic plasma spray

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