โ Scribed by M. Baricco; M. Palumbo
No coin nor oath required. For personal study only.
The basic thermodynamic aspects of glassโformation in metallic systems are reviewed. In particular, the specific features of a phase diagram with respect to glassโformation are evidenced. On the basis of the regular solution model, the effect of various thermodynamic quantities on the free energy difference between undercooled liquid and crystal phases are outlined. In order to describe the amorphous phase, a specific heat difference between liquid and solid phases in the undercooling regime is introduced in the CALPHAD assessment of various binary systems. The glassโtransition is described as a second order transition. Examples are given for different systems, including FeโB and CuโMg. From the description of the free energy of various phases as a function of composition and temperature, the driving forces for nucleation of crystal phases and the T~0~ curves are estimated.
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