Oxidation behaviour and kinetics of alpha-SiAlON ceramics

Corapcioglu G., KURAMA S.

MATERIALS AT HIGH TEMPERATURES, cilt.26, sa.2, ss.145-151, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.3184/096034009x464186
  • Dergi Adı: MATERIALS AT HIGH TEMPERATURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.145-151
  • Anahtar Kelimeler: alpha-SiAlON, oxidation, kinetics, SINTERING ADDITIVES
  • Anadolu Üniversitesi Adresli: Evet

Özet

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.