Transparent/translucent polycrystalline nanostructured yttria stabilized zirconia with varying colors

Fabrication and Densification Behavior Analysis of Metalizing Targets Using ZrO<SUB>2</SUB> Nanopowders by Magnetic Pulsed Compaction

“…20) The reason for which an incremental densification behavior is not observed is due to the fact that during the first stage of temperature which is below 1500 C, the densification proceeds nonuniformly. 19) Hence it may be concluded that although this addition of Y 2 O 3 was supposed to increase the amount of density by a certain percentage, 20,21) it showed no effects in this study on MPC consolidated sintered ZrO 2 bulks. C and 1450 C with 1.9 GPa pressure, as densification behaviors tends to be the maximum at this pressure range (1:81:9 GPa).…”

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

“…When using intermediate pressures and standard graphite tools, a two-step pressure schedule might be advantageous to homogenize the microstructure. [144,150] However, possible contamination by carbon at least at the contact surface with graphite parts [151] and the creation of light-absorbing oxygen vacancies due to reducing conditions [152] both lower the in-line transmission. Usually, a postsintering annealing step in air improves the transparency.…”

Challenges and Opportunities for Spark Plasma Sintering: A Key Technology for a New Generation of Materials

“…However, although it is possible to control the porosity through the sintering conditions (for example, using HP [Duran et al, 1989] SPS [Casolco et al, 2008] and HIP [Klimke et al, 2011]), it is still very important to keep the grain size as small as possible. Analogously to alumina, the non-cubic crystal structure leads to an optical anisotropy, birefringence in TZP is one order of magnitude higher than that of alumina, that causes diffuse scattering at grain boundaries.…”