TY - JOUR
T1 - Sintering kinetics at constant rates of heating
T2 - Effect of alumina on the initial sintering stage of Yttria-stabilized cubic zirconia powder
AU - Matsui, Koji
AU - Tanaka, Kenji
AU - Enomoto, Naoya
AU - Hojo, Junichi
PY - 2006/1/1
Y1 - 2006/1/1
N2 - The sintering behavior of 7.8 mol% Yttria-stabilized cubic stabilized zirconia (Y-CSZ) powders was investigated, with emphasis on the effect of Al2O3 addition at the initial sintering stage. The shrinkage of powder compact was measured under constant rates of heating (CRH). The powder compact with 0.25 mass% Al2O3 enhanced the densification rate with elevating temperature. The activation energies at the initial stage of sintering were determined by analyzing the densification curves. The activation energy of powder compact with Al2O 3 was lower than that of powder compact without Al2O 3. The diffusion mechanisms at the initial sintering stage were determined by the new analytical method applied to the CRH data. This analysis exhibited that the diffusion mechanism changed from grain boundary to volume diffusions (VD) by Al2O3 addition. It is therefore coneluded that the Al2O3 addition enhances the densification rate because of decreasing the activation energy of VD at the initial sintering stage.
AB - The sintering behavior of 7.8 mol% Yttria-stabilized cubic stabilized zirconia (Y-CSZ) powders was investigated, with emphasis on the effect of Al2O3 addition at the initial sintering stage. The shrinkage of powder compact was measured under constant rates of heating (CRH). The powder compact with 0.25 mass% Al2O3 enhanced the densification rate with elevating temperature. The activation energies at the initial stage of sintering were determined by analyzing the densification curves. The activation energy of powder compact with Al2O 3 was lower than that of powder compact without Al2O 3. The diffusion mechanisms at the initial sintering stage were determined by the new analytical method applied to the CRH data. This analysis exhibited that the diffusion mechanism changed from grain boundary to volume diffusions (VD) by Al2O3 addition. It is therefore coneluded that the Al2O3 addition enhances the densification rate because of decreasing the activation energy of VD at the initial sintering stage.
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U2 - 10.2109/jcersj.114.763
DO - 10.2109/jcersj.114.763
M3 - Article
AN - SCOPUS:33748319571
VL - 114
SP - 763
EP - 768
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1333
ER -