A Novel Approach to Developing Biomimetic ("Nacre-Like") Metal-Compliant-Phase (Nickel-Alumina) Ceramics through Coextrusion

A Novel Approach to Developing Biomimetic ("Nacre-Like") Metal-Compliant-Phase (Nickel-Alumina) Ceramics through Coextrusion

Bioinspired “brick‐and‐mortar” alumina ceramics containing a nickel compliant phase are synthesized by coextrusion of alumina and nickel oxide. Results show that these structures are coarser yet exhibit exceptional resistance‐curve behavior with a fracture toughness three or more times higher than t...

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Veröffentlicht in:Advanced materials (Weinheim) 2016-12, Vol.28 (45), p.10061-10067
Hauptverfasser: Wilkerson, Ryan P., Gludovatz, Bernd, Watts, Jeremy, Tomsia, Antoni P., Hilmas, Gregory E., Ritchie, Robert O.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
bimimetics
Biomimetics
Brick
Ceramics
Coextrusion
fracture toughness
Nacre
Nickel
Nickel oxides
strength
structural ceramics
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Zusammenfassung:Bioinspired “brick‐and‐mortar” alumina ceramics containing a nickel compliant phase are synthesized by coextrusion of alumina and nickel oxide. Results show that these structures are coarser yet exhibit exceptional resistance‐curve behavior with a fracture toughness three or more times higher than that of alumina, consistent with significant extrinsic toughening, from crack bridging and “brick” pull‐out, in the image of natural nacre.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201602471