{alpha} to {beta}-SiAlON phase transformations in post-sintering heat treatment
Conference
·
OSTI ID:518582
- Monash Univ., Melbourne (Australia)
It has been found recently that some of the rare earth containing {alpha}-SiAlON phases ({alpha}{prime}) are unstable and can transform to {beta}-SiAlON ({beta}{prime}) during post-sintering heat treatments between 1150 and 1550{degrees}C. The discovery of the {alpha}{prime} to {beta}{prime} phase transformation has raised a number of fundamental questions about sialon ceramics, relating to the mechanism of the transformation, thermal stability and more importantly the viability of these materials for structural applications at elevated temperatures. Meanwhile this phase transformation may offer an opportunity to develop new techniques so that different sialon ceramic composites can be tailored at relatively low temperatures after sintering. This paper presents a summary of the recent progress in this area.
- OSTI ID:
- 518582
- Report Number(s):
- CONF-960367--
- Country of Publication:
- United States
- Language:
- English
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