Study on structural evolution of nanostructured 3mol% yttria stabilized zirconia coatings during low temperature ageing

Phase stability and microstructure evolution of yttria-stabilized zirconia during firing in a reducing atmosphere

“…Nevertheless, the phase transformation from t 0 to m has also been reported [34,35]. For the YSZ specimen prepared by sintering at 1600 8C in CO, there is around 5-10% t 0 transformed to m phase after surface grinding with a diamond wheel (not shown here).…”

Resistance to Low‐Temperature Degradation of Equimolar YO1.5–TaO2.5 Stabilized Tetragonal ZrO2 Ceramics in Air

“…Recent studies showed that electron beam‐physical vapor deposited coatings of 8.6 mol% YO 1.5 –ZrO 2 (8YSZ) very slowly transformed to monoclinic at low temperatures after the exposure to prolonged annealing at 1425°C, a higher temperature than coatings are exposed to in gas turbine engines 6 . The same LTD behavior has also been observed in the plasma‐sprayed TBCs 7 . Although the detailed mechanism by which moisture facilitates the transformation in Y 2 O 3 ‐stabilized ZrO 2 materials remains elusive, there is a consensus that the transformation occurs most rapidly in a narrow temperature range, 150°–400°C, 3,8–11 and that the transformation is isothermal in character.…”

Surface yttria content and hydrothermal ageing behaviour of two step sintered 3Y-TZP ceramics

“…3 mol.% yttria-stabilised tetragonal zirconia polycrystalline (3Y-TZP) ceramic is one of the most widely used ceramic materials in various applications. It is used as grinding media, cutting tools, spares for chemical pumps, roller guides, and tweezers (Jue et al, 1991;Liang et al, 2009). Yttria stabilised tetragonal zirconia polycrystals (Y-TZP) are increasingly used as biomaterial particularly in dental and bone restorations in recent years due to its superior mechanical properties, chemical and environmental inertness, biocompatibility and aesthetic nature (Piconi & Maccauro, 1999;Chevalier, 2006;Flinn et al, 2012).…”