Microstructural Changes In Beta-Silicon Nitride Grains Upon Crystallising The Grain-Boundary Glass

Crystallising the grain-boundary glass of a liquid-phase-sintered Si3N4 ceramic for 2h or less at 1500 degees C led to formation of delta-Y2Si2O7. After 5h at 1500 degrees C, the delta-Y2Si2O7 had transformed to beta-Y2SiO7 with a concurrent dramatic increase in the dislocation density within beta-Si3N4 grains.

Author
W E Lee, G E Hilmas
Origin
Ohio State University
Journal Title
J Am Ceram Soc 1989 72 10 1931-1937
Sector
Special Glass
Class
S 329

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Microstructural Changes In Beta-Silicon Nitride Grains Upon Crystallising The Grain-Boundary Glass
J Am Ceram Soc 1989 72 10 1931-1937
S 329
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