Low‐Temperature Aging Behavior of Alumina‐Toughened Zirconia

摘要: The corrosion of alumina-toughened zirconia (ATZ) as a consequence hydrothermal treatment was investigated, especially the transformation kinetics from tetragonal to monoclinic phase. For this purpose, polished ATZ specimens (R <5 nm) were aged in water vapor at different temperatures ranging 70° 134°C. fraction phase determined using X-ray diffraction and Rietveld refinement. isothermal curves obtained fitted Mehl-Johnson-Avrami equation by least squares. An Arrhenius plot rates used determine activation energy pre-exponential factor. Following procedure, kinetic parameters extrapolated down body temperature formation simulated. In addition, optical interferometry on well-polished < 2 alternatively calculate histogram dataset. results agree very well with those measurements. Additionally, development surface roughness increasing aging time is discussed.