Nonlinear pressure dependence of the elastic moduli of fused quartz up to 3 GPa
- 1 April 1981
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 52 (4) , 2826-2831
- https://doi.org/10.1063/1.329012
Abstract
The elastic moduli of fused quartz have been determined by ultrasonic measurements under high hydrostatic compressive stress and showed a nonlinear decrease to a minimum value at 2.1–2.5 GPa, and thereafter an increase with increasing pressure. Changes in the Debye temperature and the Grüneisen constant are determined using the present results. Assuming a contribution of the fourth‐order elastic constants to the nonlinear dependence, C1111, C1112, C1122, and C1123 have been tentatively evaluated to be 11.0±1.0, 10.8±3.6, 22.7±11.1, and 8.6±2.0 TPa, respectively. However, the possibilities of a complicated potential curve or a higher‐order phase transition are also discussed.This publication has 24 references indexed in Scilit:
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