The Plant-Like Structure of Lance Sea Urchin Spines as Biomimetic Concept Generator for Freeze-Casted Structural Graded Ceramics

Biomimetics

KlausG. Nickel¹  Katharina Klang² 

[1] Department of Geosciences, Applied Mineralogy, Eberhard Karls Universität Tübingen, Wilhelmstraße 56, D-72074 Tübingen, Germany;Institute of Glass and Ceramics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 5, D-91058 Erlangen, Germany;

关键词: structural graded material;    freeze-casting;    biomimetic;    microcomputed tomography (µCT);    porous ceramic;    sea urchin spine;   

DOI  :  10.3390/biomimetics6020036

来源: DOAJ

【 摘 要 】

The spine of the lance sea urchin (Phyllacanthus imperialis) is an unusual plant-akin hierarchical lightweight construction with several gradation features: a basic core–shell structure is modified in terms of porosities, pore orientation and pore size, forming superstructures. Differing local strength and energy consumption features create a biomimetic potential for the construction of porous ceramics with predetermined breaking points and adaptable behavior in compression overload. We present a new detailed structural and failure analysis of those spines and demonstrate that it is possible to include at least a limited number of those features in an abstracted way in ceramics, manufactured by freeze-casting. This possibility is shown to come from a modified mold design and optimized suspensions.

【 授权许可】

Unknown