Effect of composition on the mechanical properties of aluminosilicate and borosilicate glasses

Journal Article · Sun Jan 01 04:00:00 EST 1978 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1978.tb09222.x· OSTI ID:6516665

Eagan, R J; Swearengen, J C

Elastic moduli and fracture toughness were determined for several Glasses in the systems soda--alumina--silica, calcia--alumina--silica, and soda-boric oxide--silica. Results for the aluminosilicates are analyzed in terms of Al/sup 3 +/:Na/sup +/ ratios. The mechanical properties do not show maxima or minima at the Al/sup 3 +/:Na/sup +/ ratio of 1, in contrast to conductivity, helium permeability, and refractive index. The moduli and toughness increase with Al/sup 3 +/:Na/sup +/ ratio, which is consistent with increased coherency of the glass network. glasses which contain B/sub 2/O/sub 3/ instead of Al/sub 2/O/sub 3/ have slightly higher moduli but are considerably tougher. The moduli of calcium aluminosilicate glasses are approximately equal to 25% greater than sodium aluminosilicates, whereas the fracture toughnesses are similar.

• Research Organization: Sandia Labs., Albuquerque, NM
• OSTI ID: 6516665
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 61:1-2; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BONDING
BORON COMPOUNDS
BORON OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
DENSITY
ELASTICITY
FABRICATION
FRACTURE PROPERTIES
GLASS
JOINING
MECHANICAL PROPERTIES
MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM OXIDES
TENSILE PROPERTIES