Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 43, Issue 8, Pages 3465-3474Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2023.02.058
Keywords
Sintering; in situ; TEM; Kinetics
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A nucleation rate limited sintering model is used to examine the sintering of polycrystalline clusters of Al2O3-SmAlO3 at high temperatures. In situ heating experiments in a transmission electron microscope show that the dominant sintering strain deformation modes are temperature-dependent. These findings provide insights into the role of temperature and sintering schedule in microstructural evolution and grain size versus density trajectory.
A nucleation rate limited sintering model was recently developed based on observations of bicrystal sintering. This work validates the applicability of this model for sintering of polycrystalline clusters of Al2O3-SmAlO3 at high temperature in the range of 1130-1610 celcius. The model fits the data well and agrees with trends observed during bicrystal sintering. A temperature dependence to the dominant sintering strain deformation modes is observed from in situ heating experiments performed in a transmission electron microscope (TEM). The observations provide insights into how temperature influences the early stages of sintering by affecting the pore size distribution through local de-sintering. This provides insights into the role heating rate and sintering schedule play in microstructural evolution that influences the grain size versus density trajectory.
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