On thermodynamic similarity of the stability boundaries of metastable metal states

The data on the thermodynamic and kinetic stability boundaries of liquid and solid Pb, Li, Al, Cu, and Fe metals over a wide range of pressures and temperatures accumulated by the authors are analyzed and compared. Molecular-dynamics models using the embedded atom and Lennard-Jones potentials are considered. Examples of assuredly absent similarity are given, and the possibility of constructing approximate similarity is discussed. The following variants for constructing dimensionless parameters are considered: the use of critical point parameters (for the liquid phase), the use of Simon parameters, and the use of parameters reached at the stability boundary at zero pressure (the latter variant was most effective for ordering the stability boundaries of crystals).