The relevance of the phase-field approach to simulate fracture in porous ceramics has been investigated. For this purpose, conditions for crack initiation using model have compared theoretical predictions coupled criterion considering a pure V-notch singularity and blunted by cavity. two types (3YSZ 8YSZ), it shown that is able accurately nucleation as predicted stress-energy criterion. nature ...

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...

Novel low-dimensional thermoelectric (TE) materials suffer from poor mechanical reliability, which limits their applications, especially in mechanically harsh environments. Here, we propose a new concept, in which the novel, abundant, thermally stable TE-nanostructures are dispersed and then intimately embedded inside a protective, mechanically reliable tetragonal ZrO2 (TZP) ceramic matrix with...

The thermal conductivity of yttria-stabilized zirconia (YSZ) thermal barrier coatings increases with high-temperature aging. This common observation has been attributed to the densification of the coatings as porosity sinters out and pores and cracks spheroidize to minimize their surface energy. We show that the thermal conductivity of fully-dense 3 mol.% Y2O3 stabilized zirconia (3YSZ) also in...

During flash sintering (FS) of ceramics, the heat loss by surface radiation is main cause temperature gradient between core and surface, which induces inhomogeneity in microstructure. To solve this problem, judicious designing sample geometry electrodes configuration proposed. Experimental simulation results show that application dogbone shape, forked electrodes, lower cross-section aspect rati...