What is spinodal?

Some articles on spinodal:

Spinodal Decomposition - Dynamics in K-space
... In the spinodal region of the phase diagram, the free-energy can be lowered by allowing the components to separate, thus increasing the relative concentration of a component material in a particular region of the ... Diffusive motion often dominates at the length-scale of spinodal decomposition ... We now see that spinodal decomposition results in domains of the characteristic length scale called the spinodal length The growth rate of the fastest growing angular wave number is where is known as the ...
Spinodal Decomposition - Phase Diagram
... type of phase transformation is known as spinodal decomposition, and can be illustrated on a phase diagram exhibiting a miscibility gap ... Inside the binodal is a region called the spinodal, which is found by determining where the curvature of the free-energy curve is negative ... The binodal and spinodal meet at the critical point ...