Abstract
Sialon glasses were first discovered as intergranular phases in sialon ceramics in which the composition, particularly Al content as well as N content, and volume fraction of such glass phases determine the properties of the sialon material. In particular sialon glasses have been shown to control high temperature mechanical properties of these ceramics. The desire to understand the nature of these brain boundary phases has resulted in a number of investigations on sialon glass formation and properties which have shown that these glasses possess higher refractoriness, elastic modulus, viscosity and hardness compared to the corresponding alumino-silicate glasses, This paper provides an overview of sialon glasses and outlines the effect of composition on properties such as glass transition temperature, hardness, Young's modulus, thermal expansion coefficient and viscosity. Some recent studies of crystallisation of sialon glasses are also reported. A comparison of fracture behaviour of a yttrium alumino-silicate and a YSiAlON glass with the same cation composition is given.
Original language | English |
---|---|
Pages (from-to) | 239-246 |
Number of pages | 8 |
Journal | Key Engineering Materials |
Volume | 237 |
DOIs | |
Publication status | Published - 2003 |
Event | Proceedings of the International Symposium on SiAlONs - Chiba, Japan Duration: 2 Dec 2001 → 4 Dec 2001 |
Keywords
- B-Phase Glass-Ceramic
- Fracture
- Heat Treatment
- LnSiAlON
- Oxynitride Glass
- SiAlON Glass
- Strength Improvement