| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
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Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
|
| Presentation Title |
Hybrid Microwave Processing of 7-8 wt.% Yttria Stabilized Zirconia |
| Author(s) |
Morsi Mohamed Mahmoud, Nestor Ankah, Mohammed Arif, Zuhair Gasem |
| On-Site Speaker (Planned) |
Morsi Mohamed Mahmoud |
| Abstract Scope |
Investigations were conducted into the use of hybrid microwave (HMW) processing of 7-8 wt.% yttria-stabilized zirconia (8 YSZ). Understanding how crystal structures evolve and how microstructural changes occur during HMW treatment are the main goals. Using HMW, disks containing commercial 8 YSZ powder were sintered for two hours at 1350°C, 1400°C, and 1450°C. A fine-grained microstructure was achieved with crystallite size of 21–34 nm. SEM verified the successful sintering process. Impressively, HMW processing significantly prevented the unwanted change from the stable tetragonal (t-ZrO2) phase to the monoclinic (m-ZrO2) phase. It's possible that this stabilizing effect results from the higher vacancy concentration produced at high temperatures during HMW, which prevents the damaging martensitic transition. As a result, HMW processing reduces the development of microcracks. HMW has the potential to be a successful method for sintering YSZ, with the prospect of quicker processing times, finer microstructures, and better material performance. |