Verification of the elastic constants for α-AI<sub>2</sub>O<sub>3</sub> using high-resolution neutron diffraction

Title: Verification of the elastic constants for α-AI₂O₃ using high-resolution neutron diffraction
Creator: Kisi, Erich H.; Howard, Christopher J.; Zhang, Jianfeng
Relation: Journal of Applied Crystallography Vol. 44, Issue 1, p. 216-218
Publisher Link: http://dx.doi.org/10.1107/S0021889810049046
Publisher: International Union of Crystallography
Resource Type: journal article
Date: 2011
Description: Precise lattice strains measured using high-resolution neutron diffraction from a solid polycrystalline sample are used to explore the single-crystal elastic constants of α-Al₂O₃ (corundum). The analysis confirms a recent suggestion that, contrary to the long-accepted view, the sign of s₁₄ should be negative. It also indicates that the magnitude of s₁₃ should be adjusted from -0.38 x 10^-12 to -0.47 x 10^-12 Pa^-1. It is found that, micromechanically, the polycrystal responds to stress in a manner very close to the Reuss limit. The results confirm the applicability of the diffraction method, which could prove useful when other techniques give ambiguous results.
Subject: lattice strains; corundum; elastic constants; neutron diffraction
Identifier: http://hdl.handle.net/1959.13/1064882
Identifier: uon:17700
Identifier: ISSN:0021-8898
Language: eng
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Verification of the elastic constants for α-AI2O3 using high-resolution neutron diffraction