|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Understanding the Mechanism of Flash Sintering with In Situ EDXRD Experiments
||Shikhar Jha, Harry Charalambous, Thomas Tsakalakos
|On-Site Speaker (Planned)
Flash sintering has three variables: electric field, current and hold time. The electric field initiates the flash but once the material goes into the state of flash under electrical field, the current controls the behavior of material (the diffusion kinetics and hence sintering, grain growth and chemical reaction) and electric field finds an equilibrium based on the chance in conductivity. Hold time is the time for which the material was kept under flash. The temperature, estimated by thermal lattice expansion does not match to the temperature needed to explain such a high rate of sintering. With the in-situ Energy Dispersive X ray diffraction technique (EDXRD) we analyze the relation of this excited state and enhanced diffusion with lattice expansion and try to separate the contribution of electric field generated defects and electrical joule heating because of resistance of sample through cyclic flash experiments on Yttria stabilized Zirconia.