Details

Autor(en) / Beteiligte

• Kisi, Erich H.
• Howard, Christopher J.
• Zhang, Jianfeng

Titel

Verification of the elastic constants for α-Al2O3 using high-resolution neutron diffraction

Ist Teil von

• Journal of applied crystallography, 2011-02, Vol.44 (1), p.216-218

Ort / Verlag

5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography

Erscheinungsjahr

2011

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• 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 × 10−12 to −0.47 × 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.