American Ceramic Society bulletin · 1985 · 48 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsMaterials CharacterizationMechanical Behavior Of MaterialsCeramic CompositesComposite MaterialsMaterial PerformanceMaterial PropertiesMechanics Of Composite MaterialsPorous CeramicsElastic ModuliExponential RegressionMechanical Properties Of Ceramic CompositesPorosityPorosity MeasurementSilicon Carbide (Sic) MaterialsSilicon Carbide CeramicsSilicon Carbide Composites
The elastic properties of SiC and AIN were determined at room temperature as a function of porosity by the resonant sphere technique. For an exponential relation, a zero porosity Young's modulus value (E0) of 437 GPa (63.4 X 10W psi) and an experimental constant (b) of 2.73 were found for SiC, and an E0 = 322 GPa (46.7 X 10W psi) and b = 2.44 for AIN. The elastic moduli of SiC-AIN solid solutions varied nearly linearly as a function of composition. The elastic moduli of SiC-AIN two-phase particulate composites were lower than those of the corresponding solid solutions and also lower than values calculated from composite theory, with the largest deviation at approx. =25% AIN and a gradual decrease to zero deviation at 100% AIN.