Oxidation behaviour and kinetics of alpha-SiAlON ceramics

Corapcioglu G., KURAMA S.

MATERIALS AT HIGH TEMPERATURES, vol.26, no.2, pp.145-151, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 2
  • Publication Date: 2009
  • Doi Number: 10.3184/096034009x464186
  • Journal Name: MATERIALS AT HIGH TEMPERATURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.145-151
  • Keywords: alpha-SiAlON, oxidation, kinetics, SINTERING ADDITIVES
  • Anadolu University Affiliated: Yes

Abstract

In this study, the oxidation behaviours of Y, Sin and Y/Sm doped alpha-SiAlON ceramics are investigated to examine the oxidation kinetics. The oxidation tests are carried out at 1300-1450 degrees C for different holding times (6-72 hours). Measurements of weight gain and observations of oxidized surfaces were made. The results show that up to 1400 degrees C, oxidation resistance of Sin-doped samples is better than dual cations (Y/Sm) doped compositions even though the former has the higher amount of grain boundary phase. Results are discussed based on grain boundary phase, oxidation morphology and thickness.