Influence of α-Al2O3 addition on sintering and grain growth behaviour of 8 mol% Y2O3-stabilised cubic zirconia (c-ZrO2)

Pressure effects and grain growth kinetics in the consolidation of nanostructured fully stabilized zirconia by pulsed electric current sintering

“…9. Taking into account the uncertainty of the experimental data, the activation energy for grain growth found in this study seems to be on the low end of the range of reported values available in the literature (226-340 kJ mol À1 ) [6][7][8]. Our values are particularly close to the activation energy found in the work of Dahl et al [8] (226 kJ mol À1 ) where nanocrystalline c-YSZ powder of similar size was consolidated in a hot press.…”

“…(6) and (7), where "a" has an Arrhenius dependence on temperature and "b" is assumed to be constant. In the cited previous studies [6][7][8] the sintering temperature was high, thus "a" is expected to have a relatively large value. When the first term on the right-hand side of Eq.…”

“…Grain growth of bulk micrometric c-YSZ has been analyzed by Chokshi [4] and experimentally investigated by Dahl et al [8], Kanters et al [6], and Tekili et al [7] during sintering in either a hot-press or a conventional furnace. In those studies the generalized parabolic growth model with n = 2 or 3 was found to be adequate to describe the grain growth behavior of this material at the temperatures used in these studies (P1250°C).…”

“…Kanters et al [6] studied the sintering of t-YSZ by dilametric methods and concluded that pore drag rather than grain-boundary mobility controls grain growth. The sintering of undoped and alumina-doped cubic zirconia was investigated by Tekeli et al using pressureless sintering at temperatures in the range 1400-1600°C [7]. They reported an activation energy for grain growth for the undoped c-YSZ of 298 kJ mol À1 .…”

Synthesis and ion conductivity of (Bi2O3)0.75(Dy2O3)0.25 ceramics with grain sizes from the nano to the micro scale

“…(8) [30] and 8YSCZ (289 kJ/mol) [31] whose grain growths were also controlled by mass transport through the grain boundary.…”