Microstructural Evolution in Near-eutectic Yttrium Silicate Compositions Fabricated from a Bulk Melt and as an Intergranular Phase in Silicon Nitride
Near-eutectic composition Y2O3─SiO2 melts were formed as bulk samples or as an intergranular phase in Si3N4. Upon cooling to room temperature the bulk material partially crystallized to γ-Y2-Si2O7 whereas the intergranular phase was glass. on heat-treating at 1500°C the bulk material transformed to γ-Y2Si2O7 whereas the intergranular glass crystallized first to γ-Y2Si2O7 and then to β-Y2Si2O7. Possible reasons for the different behavior are discussed.
W. E. Lee et al., "Microstructural Evolution in Near-eutectic Yttrium Silicate Compositions Fabricated from a Bulk Melt and as an Intergranular Phase in Silicon Nitride," Journal of the American Ceramic Society, Wiley-Blackwell, Dec 1990.
The definitive version is available at https://doi.org/10.1111/j.1151-2916.1990.tb04260.x
Materials Science and Engineering
Keywords and Phrases
Crystallization; Glass; Yttria; Silica; Silicon Nitride
International Standard Serial Number (ISSN)
Article - Journal
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