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- Spinodal_decomposition abstract "Spinodal decomposition is essentially a mechanism for the rapid unmixing of a mixture of liquids or solids from one thermodynamic phase, to form two coexisting phases. As an example consider a hot mixture of water and an oil. At high temperatures the oil and the water may mix to form a single thermodynamic phase in which water molecules are surrounded by oil molecules and vice versa. The mixture is then suddenly cooled to a temperature at which at thermodynamic equilibrium favours an oil-rich phase coexisting with a water-rich phase. Spinodal decomposition then occurs when the mixture is such that there is essentially no barrier to nucleation of the new oil-rich and water-rich phases. In other words, the oil and water molecules immediately start to cluster together into microscopic water-rich and oil-rich clusters throughout the liquid. These clusters then rapidly grow and coalesce until there is a single macroscopic oil-rich cluster, the oil-rich phase, and a single water-rich cluster, the water-rich phase.Spinodal decomposition can be contrasted with nucleation and growth. There the initial formation of the microscopic clusters involves a large free energy barrier, and so can be very slow, and may occur as little as once in the initial phase, not throughout the phase, as happens in spinodal decomposition.Spinodal decomposition is of interest for two primary reasons. In the first place, it is one of the few phase transformations in solids for which there is any plausible quantitative theory.[citation needed] The reason for this is the inherent simplicity of the reaction. Since there is no thermodynamic barrier to the reaction inside of the spinodal region, the decomposition is determined solely by diffusion.[citation needed] Thus, it can be treated purely as a diffusional problem, and many of the characteristics of the decomposition can be described by an approximate analytical solution to the general diffusion equation.In contrast, theories of nucleation and growth have to invoke the thermodynamics of fluctuations.[citation needed] And the diffusional problem involved in the growth of the nucleus is far more difficult to solve, because it is unrealistic to linearize the diffusion equation.From a more practical standpoint, spinodal decomposition provides a means of producing a very finely dispersed microstructure that can significantly enhance the physical properties of the material.".
- Spinodal_decomposition thumbnail CahnHilliard_Animation.gif?width=300.
- Spinodal_decomposition wikiPageExternalLink A1981MA25800001.pdf.
- Spinodal_decomposition wikiPageExternalLink spinum.html.
- Spinodal_decomposition wikiPageExternalLink node3.html.
- Spinodal_decomposition wikiPageExternalLink AT0025.pdf.
- Spinodal_decomposition wikiPageExternalLink ~cahn.
- Spinodal_decomposition wikiPageID "13480124".
- Spinodal_decomposition wikiPageRevisionID "596181079".
- Spinodal_decomposition hasPhotoCollection Spinodal_decomposition.
- Spinodal_decomposition subject Category:Condensed_matter_physics.
- Spinodal_decomposition subject Category:Critical_phenomena.
- Spinodal_decomposition subject Category:Materials_science.
- Spinodal_decomposition subject Category:Phase_transitions.
- Spinodal_decomposition subject Category:Thermodynamics.
- Spinodal_decomposition type CriticalPhenomena.
- Spinodal_decomposition type NaturalProcess113518963.
- Spinodal_decomposition type PhaseChange113536016.
- Spinodal_decomposition type PhaseTransitions.
- Spinodal_decomposition type Phenomenon100034213.
- Spinodal_decomposition type PhysicalEntity100001930.
- Spinodal_decomposition type Process100029677.
- Spinodal_decomposition comment "Spinodal decomposition is essentially a mechanism for the rapid unmixing of a mixture of liquids or solids from one thermodynamic phase, to form two coexisting phases. As an example consider a hot mixture of water and an oil. At high temperatures the oil and the water may mix to form a single thermodynamic phase in which water molecules are surrounded by oil molecules and vice versa.".
- Spinodal_decomposition label "Descomposición espinodal".
- Spinodal_decomposition label "Décomposition spinodale".
- Spinodal_decomposition label "Spinodal decomposition".
- Spinodal_decomposition label "Спинодальный распад".
- Spinodal_decomposition sameAs Descomposición_espinodal.
- Spinodal_decomposition sameAs Décomposition_spinodale.
- Spinodal_decomposition sameAs m.03c6rfw.
- Spinodal_decomposition sameAs Q2666979.
- Spinodal_decomposition sameAs Q2666979.
- Spinodal_decomposition sameAs Spinodal_decomposition.
- Spinodal_decomposition wasDerivedFrom Spinodal_decomposition?oldid=596181079.
- Spinodal_decomposition depiction CahnHilliard_Animation.gif.
- Spinodal_decomposition isPrimaryTopicOf Spinodal_decomposition.
