Investigation of Electrochemical, Optical and Thermal Effects during Flash Sintering of 8YSZ.

ABSTRACT: This paper reports the electrochemical, optical and thermal effects occurring during flash sintering of 8 mol % yttria-stabilized zirconia (8YSZ). In-situ observations of polycrystalline and single crystal specimens revealed electrochemical blackening/darkening during an incubation period prior to flash sintering. The phenomenon is induced by cathodic partial reduction under DC fields. When using a low frequency AC field (0.1⁻10 Hz) the blackening is reversible, following the imposed polarity switching. Thermal imaging combined with sample colour changes and electrical conductivity mapping give a complete picture of the multi-physical phenomena occurring during each stage of the flash sintering event. The partial reduction at the cathode causes a modification of the electrical properties i

SUBMITTER: Biesuz M 

PROVIDER: S-EPMC6073534 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature