Abstract
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.
Original language | English |
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Pages (from-to) | 990-993 |
Number of pages | 4 |
Journal | Key Engineering Materials |
Issue number | 136 PART 2 |
Publication status | Published - 1997 |
Externally published | Yes |
Keywords
- Thermal Stability
- α-Sialon Ceramics
- α↔β Sialon Transformation