Sea Urchin Tooth Design: An "All-Calcite" Polycrystalline Reinforced Fiber Composite for Grinding Rocks

Sea Urchin Tooth Design: An "All-Calcite" Polycrystalline Reinforced Fiber Composite for Grinding Rocks

A convenient tooth. Here we investigate how the different kinds of calcite crystals in a sea urchin tooth (left) work together as an effective grinding tool. The polycrystalline matrix has a higher elastic modulus and hardness than the single crystals, yet both work together to produce a flat grindi...

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Veröffentlicht in:Advanced materials (Weinheim) 2008-04, Vol.20 (8), p.1555-1559
Hauptverfasser: Ma, Yurong, Cohen, Sidney R., Addadi, Lia, Weiner, Steve
Format: Artikel
Sprache:eng
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Zusammenfassung:A convenient tooth. Here we investigate how the different kinds of calcite crystals in a sea urchin tooth (left) work together as an effective grinding tool. The polycrystalline matrix has a higher elastic modulus and hardness than the single crystals, yet both work together to produce a flat grinding surface (right).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200702842