Preparation of multication {alpha}-SiAlON containing strontium
- Dow Chemical Co., Midland, MI (United States)
The possibility of having Sr as an interstitial metal cation in {alpha}-SiAlON has been investigated in two systems: a single-cation system (Si{sub 3}N{sub 4}-SrO-AlN) and a multication system (Si{sub 3}N{sub 4}-(Y{sub 2}O{sub 3}/SrO/CaO)-AlN). It was found that Sr alone does not form {alpha}-SiAlON and that Sr could only be accommodated in {alpha}-SiAlON in conjunction with Y and Ca. The Sr content of {alpha}-SiAlON increased as the total content of (Y + Ca) increased and appeared to reach a limit at 0.5 at.%, or 0.15 atom per {alpha}-SiAlON. Unexpectedly, some of the {alpha}-SiAlON that contained (Sr + Y + Ca) was present as laths or fibers with the c-axis perpendicular to the hot-press direction.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 79770
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 3 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reaction densification of {alpha}{prime}-SiAlON. 2: Densification behavior
Grain growth and solubility change of sialon composites during annealing