Respected Sir,
Spinodal Decomposition: A mechanism of spontaneous separation of an unstable phase into stable phases.
A spinodal is a line or surface on the phase diagram which separates metastable states (phases) from labile i.e. absolutely unsustainable phases. The unstable phase spontaneously decomposes into stable phases. This is an irreversible process which is determined by local fluctuations in the concentrations of mixture components.
Binodal Decomposition: The term binodal describes the limits of solid solubility.
Refer the attachment for more details.
Hope this information is useful.
Javad Charkhchian
The prediction of the concentration of the spinodal and in high entropy alloys is significantly hampered by the hyperdimensional space of the alloy composition. Therefore, it is proposed to present these alloys in the form of various pseudo-binary alloys, for which the free energies, depending on temperature, depending on the composition, can be easily calculated using the methods of first principles in combination with thermodynamic models.
https://www.sciencedirect.com/science/article/abs/pii/S1359645421009605
The attached files describe spinodal and binodal decompositions in great detail.
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