Oxidation resistance of SIC-AlN ceramics coated by oxidation-assisted-pack cementation process

Giuseppe Magnani, Francesco Antolini, Leandro Beaulardi, Alida Brentari, Emiliano Burresi

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9 Citations (Scopus)

Abstract

Liquid-phase-pressureless-sintered SiC-AlN-Y2O3composites were coated by means of modified pack cementation process (OXPAC, OXidation-assisted-PAck Cementation) using rare-earth oxides, RE2O3(RE=Sc, Er, Sm, Lu, Ho), as reactive powders. The coatings, composed by the oxidation products of SiC, AlN and rare-earth silicates, were adherent to the substrate, without porosity and with a thickness of 10μm. The oxidation resistance of the coated SiC-AlN-Y2O3ceramics was also investigated at 1500°C for a period of 200h. The coated samples showed specific weight gain lower than the uncoated and pre-oxidised samples. Furthermore, the specific weight gain linearly increased with the rare-earth cationic radius. © 2010 Elsevier Ltd.
Original languageEnglish
Pages (from-to)369 - 376
Number of pages8
JournalJournal of the European Ceramic Society
Volume31
Issue number3
DOIs
Publication statusPublished - Mar 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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