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- W2794410009 abstract "An atomistic description and quantification of the individual contributions coming from the driving force and the grain boundary mobility to the phenomenon of grain growth can result in a better understanding and control of the microstructural evolution. The present work addresses these topics concerning nanocrystalline dense MgAl2O4. A systematic experimental investigation is performed on MgAl2O4 spinel using Differential Scanning Calorimetry (DSC) to determine the grain boundary energy as function of the grain size ranging from ∼8 nm to ∼150 nm to quantify the thermodynamic driving force for grain growth. The grain boundary energy displays a strong dependence on the grain size along with additional increase in excess energy with decreasing grain size as a result of a size-induced cation site disorder (inversion). A grain growth study is performed at temperatures ranging from 1100 to 1300 °C in order to determine both grain boundary mobility and activation energy. The results demonstrate faster growth behavior for smaller grains that can be related to a combined increase in excess energies and grain boundary velocities with decreasing grain size." @default.
- W2794410009 created "2018-03-29" @default.
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- W2794410009 date "2018-05-01" @default.
- W2794410009 modified "2023-10-15" @default.
- W2794410009 title "Grain boundary energy, disordering energy and grain growth kinetics in nanocrystalline MgAl2O4 spinel" @default.
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- W2794410009 doi "https://doi.org/10.1016/j.actamat.2018.02.052" @default.
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