TY - JOUR
T1 - The role of SiO2 impurities in the microstructure and properties of Y-TZP
AU - Hodgson, S. N.B.
AU - Cawley, J.
AU - Clubley, M.
PY - 1998/2/15
Y1 - 1998/2/15
N2 - A study has been carried out into the effects of SiO2 impurities at the 0-1 mass% level on the sintering characteristics, microstructure, phase composition, and mechanical properties of Y-TZP. The results show that SiO2 improves sintering at low temperatures, but gives rise to increasing grain boundary phase formation and reduction in sintered density for higher sintering temperatures. X-ray diffraction studies indicated that SiO2 impurities at these levels did not significantly affect the stability of the tetragonal phase responsible for the transformation-toughening phenomena, although significant effects on the mechanical properties of the material were observed. A model is proposed to account for these effects in terms of the microstructural changes associated with the presence of SiO2 and changes in sintering conditions.
AB - A study has been carried out into the effects of SiO2 impurities at the 0-1 mass% level on the sintering characteristics, microstructure, phase composition, and mechanical properties of Y-TZP. The results show that SiO2 improves sintering at low temperatures, but gives rise to increasing grain boundary phase formation and reduction in sintered density for higher sintering temperatures. X-ray diffraction studies indicated that SiO2 impurities at these levels did not significantly affect the stability of the tetragonal phase responsible for the transformation-toughening phenomena, although significant effects on the mechanical properties of the material were observed. A model is proposed to account for these effects in terms of the microstructural changes associated with the presence of SiO2 and changes in sintering conditions.
UR - http://www.scopus.com/inward/record.url?scp=0039491463&partnerID=8YFLogxK
U2 - 10.1016/S0924-0136(98)00302-1
DO - 10.1016/S0924-0136(98)00302-1
M3 - Article
AN - SCOPUS:0039491463
SN - 0924-0136
VL - 86
SP - 139
EP - 145
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
IS - 1-3
ER -