| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The Effect of Interface Compatibility and Grain Constraint in ZrO2-based Shape-memory Ceramics |
| Author(s) |
Edward L. Pang, Christopher A Schuh |
| On-Site Speaker (Planned) |
Edward L. Pang |
| Abstract Scope |
ZrO2-based shape-memory ceramics (SMCs) offer the potential for significant benefits over shape-memory alloys (SMAs), including higher transformation temperatures, work output, and possibly environmental resistance. Despite these potential benefits, these materials have not yet reached their full potential because in polycrystal form they are limited by catastrophic cracking during the martensitic transformation, thus restricting previous efforts to micron-scale single-/oligo-crystals. However, we have recently found that improving interface compatibility during the martensitic transformation by meeting the cofactor conditions can reduce and possibly eliminate transformation-induced cracking, thus making polycrystalline SMCs potentially viable. We present recent results on some of these preferred compositions and correlate our experimental measurements of crystallographic compatibility with observed cracking of bulk polycrystals during thermal cycling experiments. We then compare these results with those in powders to reveal the role of grain constraint on characteristics of the martensitic transformation in these materials. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |