An experimental and theoretical study of the glass-forming region of the Mg-Cu-Sn system

Tetragonal phase in the Mg–Ni–Sn system

“…In many works, the strong inter-atomic interaction and the formation of associations in the liquid state were related to the high GFA [5,7,[11][12][13][14][15]. Audebert et al [5] observed in the amorphous alloys of Mg-Cu-RE, an amorphous pre-peak in the X ray diffractogram at Q = 1.50 Å −1 (Q: scattering vector), similar to that observed for the Mg 2 Cu amorphous alloy [16].…”

Calculation of metastable free-energy diagrams and glass formation in the Mg–Cu–Y alloy and its boundary binaries using the Miedema model

“…A structural term has been added in the calculation of the free energy of formation of solid solutions [6][7][8][9][10] in the ternary alloy Mg-Cu-Y and in its binary boundaries, which contain the non-transition metals Mg and Cu. The method for adding that structural term is based on Calphad simulations [17,18], and can be applied to all systems formed by transition or non-transition metals, or by a combination of both.…”

“…For the Mg-Cu-Y system, we have calculated the surfaces representing the free energies of formation of ternary amorphous alloys, DG a Mg-Cu-Y , and solid solutions, DG ss Mg-Cu-Y , at 298 K. These free energies have been obtained using Miedema's model [10], which was previously applied by our group to ternary systems [6][7][8][9]. The free energy of formation of the ternary amorphous alloy can be written as…”

“…In the present work, we apply the ternary alloy model [6][7][8][9] to Mg-Cu-Y with the aim to develop a thermodynamic description of its glass-forming ability, and compare the results with experimental data. We first model the free energies of the stable and metastable phases in the ternary alloy and its boundary binaries.…”

“…During the last few years we have been performing the computational modelling of the free-energy diagrams in ternary alloys [6][7][8][9] within the frame of Miedema's model for the heats of formation of binary alloys [10]. In the present work, we apply the ternary alloy model [6][7][8][9] to Mg-Cu-Y with the aim to develop a thermodynamic description of its glass-forming ability, and compare the results with experimental data.…”