- 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
- Full Text
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