Third-order elastic constants of fused silica and silicate glasses
Journal Article
·
· Glass Physics and Chemistry
OSTI ID:171841
- Voronezh State Technical Univ. (Russian Federation)
- State Institute of Glass, Moscow (Russian Federation)
The ultrasonic pulse superposition method was applied to the specimens under uniaxial pressure at 77 and 298 K to determine a full set of third-order elastic constants of silicate glasses: silica, lithium silicate, and window glasses. The data obtained were used to calculate the pressure derivatives of elastic moduli of glasses and the relevant Grueneisen parameters. The third-order elastic constants of silica glass were found to be (anomalously) positive quantities and to increase with cooling. Lithium silicate and window glasses exhibit the ordinary negative third-order elastic constants at 298 K, although at low temperatures their anharmonicity acquires some features of silica glass.
- OSTI ID:
- 171841
- Journal Information:
- Glass Physics and Chemistry, Journal Name: Glass Physics and Chemistry Journal Issue: 2 Vol. 21; ISSN GPHCEE
- Country of Publication:
- United States
- Language:
- English
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