Nonhydrostatic compression of bismuth to 222 GPa: Some constraints on elasticity of the bcc-phase

Singh, AK and Akahama, Y and Kawamura, H and Menendez-Proupin, E and Gutierrez, G (2005) Nonhydrostatic compression of bismuth to 222 GPa: Some constraints on elasticity of the bcc-phase. Journal of Physics and Chemistry of Solids, 67 (9-10). pp. 2192-2196.

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Abstract

Polycrystalline bismuth sample was compressed in a diamond anvil cell and X-ray diffraction patterns from the body centered cubic13; phase of bismuth (bcc-Bi) recorded in the pressure range 12x2013;222 GPa. The analysis of diffraction data indicates that the factor13; S xBC; (S11_S12_S44/2) is positive, where Sij are the single-crystal elastic compliances. The data suggest S/S11.0.5 in the entire pressure13; range if stress continuity across the grain boundaries is assumed, and S/S11.0.9 if a condition halfway between the stress and strain13; continuities is assumed. These results are compared with the .rst principle calculations of the elastic moduli carried out recently. The13; upper bound of the uniaxial stress component (the difference between the axial and radial stress components) increases linearly from very13; low value at 12 to E3 GPa at 222 GPa.13;

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier Publisher
Uncontrolled Keywords:	Metals;High pressure;X-ray diffraction;Phase transition;Elastic properties
Subjects:	AERONAUTICS > Aeronautics (General)
Division/Department:	Materials Science Division, Other, Other, Other, Other
Depositing User:	M/S ICAST NAL
Date Deposited:	13 Jun 2008
Last Modified:	07 May 2012 11:10
URI:	http://nal-ir.nal.res.in/id/eprint/4792

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