Thermal stability of rare earth densified α-sialon ceramics
Key Engineering Materials, sa.136 PART 2, ss.990-993, 1997 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 1997
- Dergi Adı: Key Engineering Materials
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.990-993
- Anahtar Kelimeler: Thermal Stability, α-Sialon Ceramics, α↔β Sialon Transformation
- Anadolu Üniversitesi Adresli: Evet
Özet
Typical α-sialon and mixed α-β sialon starting compositions were densified by either hot pressing or pressureless sintering using the oxides of Yb, Dy, Sm and Nd. The resulting materials were heat-treated at 1450°C for up to 720 hours (1 month) to observe α → β sialon transformation. The results of microstructural characteristics and the phase assembly showed that the high temperature stability of α-sialon phase depends on the starting composition, the type of rare earth sintering additives, the amount and viscosity of the liquid phase, and the presence or absence of ß-sialon grains in the initial sintered material. © 1997 Trans Tech Publications.