|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Biological Materials Science
||Brick-and-mortar Alumina Containing a Nickel Compliant Phase Synthesized Using Spark Plasma Sintering
||Amy Wat, Claudio Ferraro, Xu Deng, Antoni P. Tomsia, Eduardo Saiz Gutierrez, Robert O. Ritchie
|On-Site Speaker (Planned)
There has been interest in new structural materials that avoid the tradeoff between high strength and high toughness. Natural materials have shown remarkable capability of breaking the tradeoff through its use of hierarchical microstructures and gradients to impart toughness without decreasing the strength of its constituent parts. The brick-and-mortar microstructure found in nacre is a well-studied example that inspires this work. Nacre is the mother-of-pearl portion of abalone shells with an increase in fracture toughness by three orders of magnitude (in energy terms) compared to its constituents. To replicate the brick-and-mortar microstructure that allows this increase in toughness, we coated alumina platelets with nickel using heterogenous precipitation. The platelets are aligned using slip casting and sintered together using spark plasma sintering. The results illustrate the need to account how the composition of the slurry and sintering conditions can affect the strength and fracture toughness of the bulk ceramic materials.
||Planned: Supplemental Proceedings volume