| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Micro- and Nano-Mechanical Behavior of Materials
|
| Presentation Title |
Persistent, Inelastic Cycling Behavior in Rare Earth Orthophosphate Ceramics |
| Author(s) |
Corinne E. Packard |
| On-Site Speaker (Planned) |
Corinne E. Packard |
| Abstract Scope |
Rare earth orthophosphate ceramics are relatively low-strength, refractory materials that have shown promise as toughness-enhancing fiber coatings in oxide-oxide ceramic matrix composites. Previous nanoindentation studies of these materials have shown energy-recovering behavior upon unloading, both discretely as pop-outs and continuously as a slope change (‘elbows’) in compositions in both the monazite and xenotime structures. This work reports the behavior of several rare earth orthophosphate materials under cyclic nanoindentation loading with blunt and sharp tips on both polycrystalline and single crystal materials. We find that these materials exhibit highly reversible cyclic deformation, dissipate more energy than shape memory ceramics, and are not limited to a narrow temperature range. |