| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Development in Light Weight Alloys and Composites
|
| Presentation Title |
Single and Double Core-Shell Nanocomposite Bulk Ceramics in the Y2O3-ZrO2-Al2O3 System |
| Author(s) |
Kevin P. Anderson, Benjamin Greenberg, James Wollmershauser, Boris Feigelson |
| On-Site Speaker (Planned) |
Kevin P. Anderson |
| Abstract Scope |
Composites embody the pursuit of synergy in materials, an effort to retain the desirable properties of constituents while compensating for their shortcomings. To this end, core-shell based structures represent highly uniform and intimate composites that can be tailored through core and shell customization. Additionally, nanoscale core-shell structured composites may exploit size-dependent phenomena such as the Hall-Petch effect for further property enhancements. In this work, single and double core-shell composites in the Y2O3-ZrO2-Al2O3 system were fabricated and characterized, and the effects of grain size and shell thickness on core/shell integrity and mechanical properties were investigated. Core-shell powders were produced through particle atomic layer deposition (pALD), then sintered via Environmentally Controlled – Pressure Assisted Sintering (EC-PAS). EC-PAS utilizes the creation and preservation of pristine nanoparticle surfaces throughout the sintering process, applied pressure (<2 GPa), and low temperature (< 0.5 Tm) to achieve densification with negligible grain growth. |