High-Pressure Mechanical Response of Two Vitreous Silicates
The improved understanding of the high-pressure response of vitreous silicates is relevant to sought-after improvements of transparent protective systems. In this study, the quasi-static high-pressure (> 1 GPa) mechanical responses of BOROFLOAT® and Starphire® vitreous silicates were examined using three methods.The first combined x-ray radiography with compression testing in a Paris-Edinburgh anvil at the Advanced Photon Source at Argonne National Laboratory, and is a method recently developed at the University of Alabama at Birmingham. An outcome of that testing is the portrayal of volume change as a function of (quasi) hydrostatic pressure or its equation of state. The second employed method was spherical indentation and is one that can be used to identify the onset of permanent deformation in brittle materials. The outcome of that testing is the estimation of an apparent yield stress. The last method involved the use of a double-toroid diamond anvil cell to compress a specimen. This test method subjects a relatively large volume of material to a quasi hydrostatic stress and whose volume enables material postmortem analysis. An outcome of that testing, when coupled with precision density measurements, is the identification of the apparent hydrostatic pressure when permanent densification initiates.The three test methods and results from the testing of BOROFLOAT® and Starphire® vitreous silicates are presented.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1482450
- Report Number(s):
- ORNL/TM-2018/1019
- Country of Publication:
- United States
- Language:
- English
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