Sea Urchin Spines as a Model-System for Permeable, Light-Weight Ceramics with Graceful Failure Behavior. Part II.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression

doi:10.1016/S1672-6529(08)60143-2

J4 ›› 2009, Vol. 6 ›› Issue (4): 357-364.doi: 10.1016/S1672-6529(08)60143-2

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Sea Urchin Spines as a Model-System for Permeable, Light-Weight Ceramics with Graceful Failure Behavior. Part II.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression

V. Presser¹, C. Kohler¹, Z. ?ivcová|², C. Berthold¹, K. G. Nickel¹, S. Schultheiß³, E. Gregorová², W. Pabst²

1. Institute for Geoscience (IFG), Applied Mineralogy, Eberhard-Karls-Universität Tübingen,
72074 Tübingen, Germany
2. Department of Glass and Ceramics, Institute of Chemical Technology, Prague (ICT Prague),
166 28 Prague 6, Czech Republic
3. Institute for Applied Geosciences, Technische Universität Darmstadt, 64277 Darmstadt, Germany

Online:2009-12-30

Abstract

Abstract:

Sea urchin spines were chosen as a model system for biomimetic ceramics obtained using starch-blended slip casting. Porous alumina ceramics with cap-shaped layers with different alternating porosities were found to have superior fracture behavior under bulk compression compared to ceramics with uniform porosity. They fail in a cascading manner, absorbing high amounts of energy during extended compression paths. The porosity variation in an otherwise single phase material mimicks the architectural microstructure design of sea urchin spines of Heterocentrotus mammillatus, which are promising model materials for impact protection.

Key words: biomimetic engineering, sea urchin spines, porous alumina ceramics, starch-blended slip casting, mechanical behavior, compression

V. Presser, C. Kohler, Z. ?ivcová, C. Berthold1, K. G. Nickel, S. Schulthei?, E. Gregorová, W. Pabst. Sea Urchin Spines as a Model-System for Permeable, Light-Weight Ceramics with Graceful Failure Behavior. Part II.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression[J].J4, 2009, 6(4): 357-364.

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Sea Urchin Spines as a Model-System for Permeable, Light-Weight Ceramics with Graceful Failure Behavior. Part II.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression

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