Preparation and mechanical properties of Al₂O₃/Al laminated ceramic matrix composites

Abstract

Three series of Al₂O₃/Al laminated ceramic matrix composites, named SPA, SPV and HP, were fabricated by different methods. SPA and SPV were prepared using Al₂O₃ slices and Al slurry via screen printing and subsequent heat treatment in air or vacuum. HP samples were made by hot pressing the layered stack of Al foils and Al₂O₃ slices. SEM and XRD were applied to analyze the microstructure and the interlayer crystal phase. The bending strength, fracture toughness and fracture work of the samples made by the three methods were measured and compared. The results show that the composites have much better toughness and higher fracture work than the Al₂O₃ slice. Among the samples made by the three methods, the samples made by hot pressing have the optimum mechanical performance. The displacement-load curves and fracture mechanism were analyzed.

Keywords

laminated / ceramic matrix composite / mechanical properties

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