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Thermal cycling and oxidation resistance of B modified ZrB2-SiC coatings on SiC coated graphite

  • Wang Peng
  • , Zhou Shanbao
  • , Zhang Xinghong
  • , Gui Kaixuan
  • , Li Yongxia
  • , An Jiadong
  • , Han Wenbo*
  • *Corresponding author for this work
  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

To protect graphite matrix from oxidation, B modified ZrB2-SiC coatings were prepared on SiC coated graphite by a two-step pack cementation. The microstructure, thermal cycling and oxidation resistant properties of the coatings were studied. The results show that the as-prepared coatings were mainly composed of SiC, ZrB2 and Si. ZS50-1B, ZS50-3B and ZS50-5B showed good thermal cycling resistance with 97.4%, 98.2% and 98.6% weight retention after 15 thermal cycles between 1500°C and room temperature. ZS50-7B and ZS50-9B showed good oxidation resistance with 93.5% and 97.5% weight retention after 19h oxidation at 1500°C.

Original languageEnglish
Pages (from-to)330-337
Number of pages8
JournalSurface and Coatings Technology
Volume280
DOIs
StatePublished - 25 Oct 2015

Keywords

  • Boron addition
  • Coating
  • Oxidation resistance
  • Thermal cycling resistance
  • ZrB-SiC

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