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Mechanical Properties of 3BaO·5SiO 2 Glass‐Ceramics
Author(s) -
FREIMAN S. W.,
ONODA G. Y.,
PINCUSI A. G.
Publication year - 1974
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1974.tb11352.x
Subject(s) - microstructure , materials science , flexural strength , composite material , crystallization , ceramic , elastic modulus , glass ceramic , abrasion (mechanical) , phase (matter) , chemical engineering , chemistry , organic chemistry , engineering
Flexural strengths, elastic moduli, and fracture energies of 3BaO·5SiO 2 glass‐ceramics with a variety of microstructures were determined. Flexural strength depends on the size of spherulites in the microstructure and on the amount of glassy phase remaining in the material. Higher strengths were achieved in glass‐ceramics containing a tabular, rather than a spherulitic, microstructure. The addition of small quantities of Na 2 O to the original glass promoted production of the higher‐strength tabular morphology after only 10 min of crystallization at 775°C. The increase in the strength of the glass‐ceramics over that of the glass resulted from an increase in the fracture energy and elastic modulus of the material. The microstructure had little effect on the size of the flaws introduced by abrasion.