TY - JOUR
T1 - Low temperature superplastic flow of yttria stabilized tetragonal zirconia polycrystals
AU - Boutz, M.M.R.
AU - Winnubst, A.J.A.
AU - Burggraaf, A.J.
AU - Nauer, M.
AU - Carry, C.
PY - 1994
Y1 - 1994
N2 - Very fine-grained (0·2 μm), dense Y-TZP ceramics have been produced by free sintering at 1150°C. The superplastic deformation of these materials is studied in compression at low temperatures (1100-1300°C). A significant enhancement in initial strain rates was observed compared to a coarser-grained (0·4 μm) commercially available material (Tosoh, Japan). Doping with small amounts of Fe2O3 led to a further enhancement of strain rate. Deformation occurred via interface reaction controlled grain boundary sliding. Prior to deformation a continuous glassy silicate film was observed at the grain boundaries. The applicability of interface reaction controlled solution-precipitation creep models is discussed. The absence of a steady-state during deformation at low stresses is attributed to dewetting of the silicate film.
AB - Very fine-grained (0·2 μm), dense Y-TZP ceramics have been produced by free sintering at 1150°C. The superplastic deformation of these materials is studied in compression at low temperatures (1100-1300°C). A significant enhancement in initial strain rates was observed compared to a coarser-grained (0·4 μm) commercially available material (Tosoh, Japan). Doping with small amounts of Fe2O3 led to a further enhancement of strain rate. Deformation occurred via interface reaction controlled grain boundary sliding. Prior to deformation a continuous glassy silicate film was observed at the grain boundaries. The applicability of interface reaction controlled solution-precipitation creep models is discussed. The absence of a steady-state during deformation at low stresses is attributed to dewetting of the silicate film.
U2 - 10.1016/0955-2219(94)90107-4
DO - 10.1016/0955-2219(94)90107-4
M3 - Article
SN - 0955-2219
VL - 13
SP - 103
EP - 111
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 2
ER -