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Elastic Properties of Polycrystalline Aluminum Oxynitride Spinel and Their Dependence on Pressure, Temperature, and Composition
Author(s) -
GRAHAM EARL K.,
MUNLY W.C.,
McCAULEY JAMES W.,
CORBIN NORMAN D.
Publication year - 1988
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/j.1151-2916.1988.tb07527.x
Subject(s) - spinel , materials science , corundum , crystallite , ambient pressure , elastic modulus , isotropy , porosity , mineralogy , composite material , aluminium , bulk modulus , analytical chemistry (journal) , thermodynamics , chemistry , metallurgy , physics , chromatography , quantum mechanics
The isotropic elastic moduli of four specimens of nitrogen‐stabilized cubic aluminum oxide (ALON) were measured using pulse superposition interferometry. Experiments were carried out as a function of both pressure (ambient to 1 GPa) and temperature (0° to 25°C) for specimens of 30.0 and 35.7 mol% AlN. The second‐order moduli results were corrected for porosity using the “self‐consistent‐scheme” approach. Pertinent ambient results for isotropic pore‐free ALON are K = 226.3 GPa and G = 132.0 GPa for the 30.0 mol% AlN material, and K = 229.8 GPa and G = 135.5 GPa for 35.7 mol% ALON ( K and G denote the bulk and shear moduli, respectively). The estimated uncertainties in these values are about 2%. The second‐order elastic properties of ALON, as well as their pressure and temperature derivatives, fall midway between spinel (MgAl 2 O 4 ) and corundum (Al 2 O 3 ), indicating the excellent potential of this material for structural engineering purposes.