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 that of alumina, consistent with significant extrinsic toughening, from crack bridging and "brick" pull-out, in the image of natural nacre.
Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
Ryan P
RP
Wilkerson
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
Bernd
B
Gludovatz
Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
Jeremy
J
Watts
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
Antoni P
AP
Tomsia
Department of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
Gregory E
GE
Hilmas
Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
Robert O
RO
Ritchie
bimimetics; coextrusion; fracture toughness; strength; structural ceramics