Stabilization of cubic zirconia by carbon nanotubes

Preparation of ZrO2 and ZrO2/SiC powders by carbothermal reduction of ZrSiO4

“…Considering literature data and their own results, Luo et al [17] also suggests that carbon can help c-ZrO 2 stabilization in two ways: 1 -by surrounding c-ZrO 2 nanoparticles and preventing their aggregation; 2 -by incorporating into the interstitial positions in ZrO 2 .…”

“…By coating the ZrO 2 nanoparticles with Al 2 O 3 layer, their growth is suppressed and due to the high surface tension in ZrO 2 nanoparticles [17,20,21], t(c)-ZrO 2 structure is retained at low temperatures.…”

Enhancement of physical properties in ZrO₂/Ga₂O₃ co-substituted indium oxide

“…Above this composition (x = 0.15) the a parameter remain practically constant and impurity phases identified to both tetragonal and monoclinic ZrO 2 starts to appear. It is known that ZrO 2 has three polymorphs: monoclinic (m-phase, below 1170 °C), tetragonal (t-phase, between 1170 and 2370 °C) and cubic (cphase, above 2370 °C) [19,20]. In order to check the reproducibility of the synthesis procedure, two sets of samples were prepared, using the same preparative method, namely 1 st and 2 nd preparation, respectively.…”

Sintering in a graphite powder bed of alumina-toughened zirconia/carbon nanotube composites: a novel way to delay hydrothermal degradation

“…Schneider et al [16] reported a monoclinic phase content of 50% in an ATZ ceramic (80 wt% 3Y -TZP and 20 wt% Al 2 O 3 ) aged at 134 1C for 100 h in both water and water vapour (initial roughness R a of 4 nm). The effect of carbon on the phase structure and stability of ZrO 2 has been reported by Wang and Liang [20] and Luo et al [21]. Nevertheless, to the best of our knowledge, there are no literature data related to the LTD of carbon nanotube (CNT)-reinforced ATZ composites sintered in air using a graphite powder bed to prevent the decomposition of the carbon nanotubes.…”