Development of α-β SiAlON ceramics from different Si 3N4 starting powders

Acikbas N. C., KARA F., MANDAL H.

Key Engineering Materials, vol.403, pp.107-108, 2009 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 403
  • Publication Date: 2009
  • Doi Number: 10.4028/3-908454-00-x.107
  • Journal Name: Key Engineering Materials
  • Journal Indexes: Scopus
  • Page Numbers: pp.107-108
  • Keywords: Cost effective SiAlONs, Fracture toughness, Si3N4 powders
  • Anadolu University Affiliated: Yes


α-β SiAlON ceramics were produced from different starting Si3N4 powders including P-Si3N4 and α-Si3N4 powders and mixtures of these powders. Gas pressure sintering was used for sintering. After sintering, resultant fracture toughness values were correlated with microstructure and starting powders. By optimizing chemistry and process parameters; α-β SiAlON ceramics with reasonable fracture toughness can be produced from rather coarse β-Si 3N4 powder. This could improve the economic viability of SiAlON ceramics since β-Si3N4 powders are less costly.