Al–Al2O3 Composites with Interpenetrating Network Structures: Composite Modulus Estimation |
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| Authors: | Robert J Moon Matthew Tilbrook Mark Hoffman Achim Neubrand |
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| Affiliation: | School of Materials Science and Engineering, The University of New South Wales, NSW 2052, Australia; Fraunhofer-Institute für Werkstoffmechanik, 79108 Freiburg, Germany |
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| Abstract: | The effective Young's moduli of co-continuous Al–Al2O3 composites over the 5–97 vol% Al2O3 composition range were experimentally measured and compared with theoretical composite modulus values predicted using the methods of Ravichandran, Tuchinskii, Hashin-Shtrikman, and the effective medium approximation (EMA). The influence of phase morphology and the modulus ratio ( E 1/ E 2) of the constituent phases on the resulting experimental and calculated Young's modulus is discussed. For two-phased co-continuous composites with a modulus ratio greater than 5, the EMA, with an appropriate microstructural shape factor, was the most consistent method for approximating the composite Young's modulus over the entire composition range. |
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