A5082093836- Nuclear materials and radiation effects
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Electronic and Structural Properties of Oxides
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Technologies Research
- Material Dynamics and Properties
- Microwave Dielectric Ceramics Synthesis
- Advanced Battery Materials and Technologies
- Metal Extraction and Bioleaching
- Minerals Flotation and Separation Techniques
- Advanced battery technologies research
- Advanced ceramic materials synthesis
- Mineral Processing and Grinding
nLIGHT (United States)
2022
University of Colorado Boulder
2019-2021
Abstract It is known that once flash has been triggered with furnace heating, specimens can be held in the state of constant flash, or Stage III, outside at ambient temperature. The maintained by current flowing through specimen. We show this in‐flash further preserved when specimen immersed into liquid nitrogen. Furthermore, we nature material existing III quenched turning off power to while it still immersion. Normally, during cool, revert their original turned off. However,...
Abstract Recent results from molecular dynamics simulations have shown that significant concentrations of Frenkel pairs can be introduced by the proliferation phonons lying at edge Brillouin zone and when above Debye temperature. Following work Granato (2014 Eur. Phys. J. B 87 18) we extend those calculations to influence Frenkels on elastic modulus. Significant softening is predicted which confirmed in situ measurements modulus during flash. been proposed play a central role flash phenomena.
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Once triggered by the application of electric field and furnace heating, a polycrystal can be held in constant state flash with switched off. The specimen temperature now controlled current flowing through it. We report on measurement elastic modulus 3 mol% yttria stabilized zirconia such flash. Significant softening is measured. decline steepens temperature. In contrast nominal tends to stabilize at higher temperatures. mechanical damping increases under experiments were done activating...
We report in-situ measurements of the elastic modulus dense polycrystalline zirconia held in a constant state flash, i.e. during Stage III flash experiments. The modulus, measured with and without is lowered by 10 - 35 %, temperature range 1100-1400 oC. specimen temperature, pyrometer, was consistent estimate from black body radiation model. These echo recent publications on role phonons onset namely Debye as lower bound for formation Frenkel pairs molecular dynamics calculations...