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Mechanical properties of innovative metal/ceramic composites based on freeze-cast ceramic preforms

  • Siddhartha Roy
  • Jens Gibmeier
  • Kay André Weidenmann
  • Alexander Wanner
Chapter

Abstract

This article provides an overview of recent research carried out about the mechanical properties of an innovative metal/ceramic composite fabricated by squeeze-casting liquid Al-12Si in freeze-cast alumina preforms. The composite consists of domains made of alternating metallic and ceramic lamellae. Elastic and elastic-plastic deformation behavior and mechanism of internal load transfer under external compressive stresses in individual domains with different orientations were studied. Results show that the stiffness is highest along the freezing direction and lowest along the direction perpendicular to it. When compressed along directions parallel to freezing direction, the composite is strong and brittle. When compressed along other directions, the behavior is controlled by the soft metallic alloy. Studies of internal load transfer under external compressive stress along different directions show that the mechanism of internal load transfer differs significantly when loading direction changes from that along the freezing direction to the direction perpendicular to it.

Keywords

Metal Matrix Composite Lamella Spacing Domain Orientation Ceramic Preform Freezing Direction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Siddhartha Roy
    • 1
  • Jens Gibmeier
    • 1
  • Kay André Weidenmann
    • 1
  • Alexander Wanner
    • 1
  1. 1.Institut für Angewandte Materialien, Karlsruher Institut für TechnologieKarlsruheGermany

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