|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Biological Materials Science
||Bioinspired Structural Materials - “Nacre-Like” Compliant-Phase Ceramics: Where Are We Now?
||Robert O. Ritchie, Antoni P Tomsia
|On-Site Speaker (Planned)
||Robert O. Ritchie
It is decade since freeze-casting was first used to develop bioinspired structural ceramics with “nacre-like” brick-and-mortar structures. These materials can exhibit unique combinations of strength and toughness: their strength from the ceramic “bricks” and ductility/toughness from limited inter-brick displacements within the thin compliant “mortar”. Early developments showed great promise with “nacre-like” alumina ceramics containing PMMA displaying record toughnesses above 30 MPam. Although a few notable successes have occurred since, progress has been slow, primarily because of difficulties in processing high volume-fraction porous ceramics with a fully infiltrated compliant-phase. Theoretical modeling suggests that even better strength and toughness can be realized with metallic mortars, but this further compromises processing as metals invariably do not wet ceramics. Here we assess the development of compliant-phase ceramics, and discuss alternative processing techniques, such as reactive wetting, coextrusion and spark-plasma sintering, which are more adaptable to making high volume-fraction, brick-and-mortar, ceramics with a metallic compliant-phase.
||Planned: Supplemental Proceedings volume