Improved densification and ionic conductivity in flash-sintered
gamma-ray irradiated yttria-stabilized zirconia
Abstract: Experiments on electric field-assisted pressureless sintering were conducted, with a dilatometer connected to a power supply, in zirconia: 8 mol% yttria polycrystalline ceramics exposed to gamma radiation. During heating to 1000 °C, an electric field of 150 V cm−1 was applied at room temperature up to a sharp thickness shrinkage occurred (flash sintering). It was found that the higher the imparted gamma radiation dose the higher the shrink-age. The shrinkage enhancement and the increase of the total ionic conductivity, when compared to non-irradiated sample, were probably due to the increase of oxygen vacancy concentration after exposure togamma radiation.
Author(s): R. Muccillo, E.N.S. Muccillo
SCRIPTA MATERIALIA
Volume: 170 Pages: 120- 123
Received 26 April 2019 Accepted 2 June 2019
