Stability of structural materials based on ZrO2

Development of Al2O3-based hybrid ceramic matrix composite coating to mitigate the erosive wear of advanced steel

“…Considering the properties of ceramics (i.e. their resistance to high-temperature oxidation, corrosion, and wear) [28][29][30][31] and recent developments in coating technologies, suitable coatings can be sought as probable solutions to the issues mentioned above. When a high deposition rate and a thick coating are desired on a large surface area, it is worth considering thermal spray techniques.…”

Advanced ceramics and coatings for erosion‐related applications in mineral and oil and gas production: A technical review

“…22,152 Similar results demonstrating higher erosion resistance of the ceramics with an additional zirconia phase were obtained by Curkovic et al 184 The performance of PSZ and ZTA ceramics was about the same regardless the impingement angle, and the performance of Y 2 O 3 -PSZ and ZTA is greater than of MgO-PSZ. It is assumed that for materials like PSZ with high K Ic (greater than ∼5.5 MPa m 1/2 ), the wear process transforms to a plastic flow process, 185,186 unlike alumina and many other ceramics where destruction occurs from the micro-cracking grain boundaries, starting from the glassy phase, with a final removal of the entire grains. Materials with smaller grain sizes (from submicron to a few µm grain size), particularly, zirconia, ZTA, and high alumina, experienced less wear compared to coarser ceramics of similar compositions; the surface of the fine-grain ceramics became just polished.…”

“…At the wear processes, especially if it is coupled with corrosion, as mentioned before, the less stable tetragonal phase gradually transforms to the monoclinic phase, which is accompanied by the micro-cracking and gradual slow destruction (mostly, the monoclinic phase is removed); density slightly increases and fracture toughness decreases. 21,241 According to Prokhorov et al, 186 when K Ic is >5.4 MPa m 1/2 , the wear process transforms to the plastic flow process. Comparing PSZ ceramics, it seems that the t-to-m phase transformation for Y 2 O 3 -PSZ occurs to lesser extents compared to MgO-and CaO-PSZ with less related micro-cracking, which, along with higher mechanical properties, also explains a better performance of Y 2 O 3 -PSZ.…”