Yttria stabilized zirconia (3 mol% YSZ) ceramics were prepared by Flash-SPS, while allowing high heating rates up to 200 °C/s, which led the extremely fast densification within a few seconds. The had strong impact on sintering mechanisms, in terms of and grain growth. While specimens ended with 5–15 vol% porosity limited growth (< 350 nm), their hardness is higher than fully dense counterpart S...

Recently, local melting of the particle surfaces confirmed the formation of spark and plasma during spark plasma sintering, which explains the rapid densification mechanism via liquid. A model for rapid densification of flash sintered ceramics by liquid film capillary was presented, where liquid film forms by local melting at the particle contacts, due to Joule heating followed by thermal runaw...