WEB Mechanism(s) of Flash SinteringThursday (24.09.2020) 16:25 - 16:40 P: Processing and Synthesis 1 Part of:
Recent measurements of “energy-deficit” in current rate experiments, that is, electrical energy injected into the specimen and the energy loss of radiation, is being interpreted as the generation of Frenkel pairs in experiments gadolinium doped ceria. The mole fraction of these defects correspond well to the overall transport of mass to close the pores in the specimens. This quantitative agreement points towards a mechanism of flash sintering that finds its genesis within the grain matrix with the interstitials being transported to the pore-surfaces and the vacancies to the grain boundaries to produce an overall transport of mass from grain boundaries into the pores. This mechanism has other implications for example related to constrained sintering, which is present in conventional processing.