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Single‐Crystal Elastic Properties of Aluminum Oxynitride (Al ON ) from Brillouin Scattering
Author(s) -
Satapathy Sikhanda,
Ahart Muhtar,
Dandekar Dattatraya,
Hemley Russell J.,
Schuster Brian,
Khoma Petro
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14065
Subject(s) - auxetics , brillouin scattering , anisotropy , poisson's ratio , materials science , brillouin zone , scattering , modulus , condensed matter physics , elastic modulus , single crystal , aluminium , young's modulus , bulk modulus , poisson distribution , crystallography , mineralogy , composite material , optics , chemistry , physics , statistics , mathematics , optical fiber
The Brillouin light scattering technique was used to determine experimentally the three independent elastic constants of cubic aluminum oxynitride at the ambient condition. They areC 11 = 334.8 ± 1.8 G P a , C 12 = 164.4 ± 1.2 G P a , andC 44 = 178.6 ± 1.1 G P a . Its bulk modulus is 221.2 GPa . The magnitude of Zener anisotropic ratio is 2.1 similar to other spinels. The anisotropic nature of the material is shown by a large variation in the Young's modulus and Poisson's ratio with crystallographic directions. The material was found to be auxetic in certain orientations.