The effect of nonhydrostaticity on measuring the pressure in metals by energy dispersive X-ray diffraction in the diamond anvil cell
- 1 April 1991
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 6 (3) , 183-186
- https://doi.org/10.1080/08957959108203208
Abstract
Using the Chua-Ruoff scaling relation for the pressure dependence of the compressive flow stress, the effect of the presence of a finite yield strength on the measurement of pressure in a diamond anvil cell by energy dispersive X-ray diffraction is calculated. In experiments in which the pressure was found by X-ray diffraction to be 364 GPa (exceeding the pressure at the center of the earth) without this correction, it is calculated that the actual pressure lies in the range 378-395 GPa with the correction for nonhydrostaticity being 5-9%.Keywords
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