|About this Abstract
||Materials Science & Technology 2019
||Sintering and Related Powder Processing Science and Technologies
||In-situ Monitoring of Interfaces Being Formed as a Functon of Pressure, Temperature and Composition
||Thomas Rudzik, Rosario A. Gerhardt
|On-Site Speaker (Planned)
Understanding of the underlying mechanisms of sintering has been difficult to achieve due to the dependence of the driving force for densification on the instantaneous microstructure at every point throughout the sintering process. Although many different characterization methods have been used to study sintering, most either cannot be conducted in-situ or do not provide the level of information which would be necessary to understand how microstructures evolve during sintering. In this work, it is shown that electrical characterization of powders while being compacted as a function of pressure and temperature can reveal microstructural details that cannot be obtained any other way. When ac impedance is conducted in conjunction with small angle scattering, results are found to be especially sensitive to changes in interfacial characteristics. Furthermore, it is demonstrated that equivalent circuit modeling of the measured spectra can differentiate between point contact formation and other types of interfaces.
||Definite: At-meeting proceedings