Sea Urchin Spines as a Model-System for Permeable, Light-WeightCeramics with Graceful Failure Behavior. PartⅡ.Mechanical Behavior of Sea Urchin Spine Inspired Porous Aluminum Oxide Ceramics under Compression |
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| Authors: | V.Presser C.Kohler C.Berthold K.G Nickel S.Schulthei W.Pabst |
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| Affiliation: | V.Presser,C.Kohler,C.Berthold,K.G Nickel,S.Schulthei(B),W.Pabst |
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| 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 mammillutus, which are promising model materials for impact protection. |
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| Keywords: | biomimetic engineering sea urchin spines porous alumina ceramics starch-blended slip casting mechanical behavior compression |
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