Effect of starting composition, type of rare earth sintering additive and amount of liquid phase on alpha reversible arrow beta sialon transformation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, cilt.17, sa.4, ss.599-613, 1997 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 17 Sayı: 4
- Basım Tarihi: 1997
- Doi Numarası: 10.1016/s0955-2219(96)00112-4
- Dergi Adı: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.599-613
- Anadolu Üniversitesi Adresli: Hayır
Özet
Five different alpha-beta sialon and alpha-sialon compositions have been prepared using different rare earth oxide additives namely, neodymium, samarium, dysprosium and ytterbium., Post-sintering heat treatments have been carried out at 1450 degrees C for up to 720 h (one month) to observe alpha --> beta sialon transformation. A combination of X-ray and microstructural observations has shown that the high-temperature stability of the alpha-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 beta-sialon grains in the initial sintered material. (C) 1997 Elsevier Science Limited. All rights reserved.