Mullite Oxidation Resistant Coating for SiC-coated Carbon/Carbon Composites by Supersonic Plasma Spraying

Chao Ma, Hejun Li, Heng Wu, Qiangang Fu, Can Sun, Xiaohong Shi, Yulei Zhang, Zhengzhong Zhang, Jun Tao, Zhihai Han

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

To improve the oxidation resistance of carbon/carbon (C/C) composites, mullite coating was prepared on the surface of SiC-coated C/C composites by supersonic plasma spraying. Phases and microstructures of mullite coating were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The coating primarily consists of a single phase of mullite (3Al2O3-2SiO2). The SEM results show that mullite coating was continuous and well bonded with the SiC inner layer without penetrating crack. Mullite coating exhibited good oxidation resistance. After 98.5 h oxidation at 1773 K and 9 thermal shock cycles between 1773 K and room temperature, the weight loss of the coated C/C composites was only 2.57%.

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalJournal of Materials Science and Technology
Volume29
Issue number1
DOIs
StatePublished - Jan 2013

Keywords

  • Carbon/carbon composites
  • Mullite coating
  • Oxidation
  • Supersonic plasma spraying

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