The Role of Additives in the Densification of Nitrogen Ceramics.
Final technical rept. Apr-Oct 77,
NEWCASTLE-UPON-TYNE UNIV (ENGLAND)
Pagination or Media Count:
The role of additives magnesia, yttria, ceria and zirconia in the densification of silicon nitride and b-sialon is investigated with the objective of improving the high-temperature mechanical and chemical properties of these nitrogen ceramics. Each of the oxide additions reacts with surface silica and some of the nitride to give an oxynitride liquid that promotes densification by the successive stages of particle rearrangement and solution-precipitation.
- Ceramics, Refractories and Glass