Thermodynamic and Kinetic Studies of Glass-Forming Compositions in Ca‒Mg‒Cu Ternary Metallic Glasses

Abstract: Herein, we systematically studied the thermodynamic and kinetic aspects of glass forming compositions in Ca–Mg–Cu alloy obtained by drawing the isocontour. Parameter (Formula presented.) derived from the enthalpy of chemical mixing (ΔH <inf>chem</inf>) and normalized mismatch entropy (Formula presented.) is used as a glass-forming ability (GFA) parameter. Variation of (Formula presented.) with reported and calculated compositions is evaluated. Linear relation of Cu with (Formula presented.) is observed, whereas inverse relation of Ca and Mg is obtained. The linear variation of (Formula presented.) with a supercooled liquid region (SCLR) (Formula presented.) is studied. Inverse correlation of critical cooling rate (Formula presented.) with (Formula presented.) is obtained. (Formula presented.) for predicted compositions is found close to that of reported compositions. Therefore, Cu should be added carefully with other elements to improve the GFA and reduce the cooling rate of Ca‒Mg‒Cu glassy. In this paper, an empirical correlation of (Formula presented.) with (Formula presented.) is proposed, and the modeled values are found to agree with the experimental values.