An interface nucleation rate limited sintering kinetic model applied to in situ sintering Al2O3-SmAlO3 composites. Issue 8 (July 2023)

• Record Type: Journal Article
• Authors: Dillon, Shen J.; Ma, Yonghui; Lang, Eric; Ouyang, Jia-hu; Hattar, Khalid
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 8(2023)
• Page Start: 3465
• Page End: 3474
• Publication Date: 2023-07
• Subjects: Sintering -- Al2O3 -- in situ -- TEM -- Kinetics; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2023.02.058
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: 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 Al2 O3 -SmAlO3 at high temperature in the range of 1130–1610 ℃. 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.