Devitrification and Crystallization of Zr₄₀Ti₁₀Cu₅₀ Bulk Metallic Glass

Phase formation and thermal stability in Cu–Zr–Ti(Al) metallic glasses

“…The lattice constant of the C15 Laves phase (MgCu 2 -type, Fd-3m) was determined to be a ¼ 0.7354 nm. This is in good agreement with values reported by Petrzhik et al [37]. As the occupancy of the different lattice sites in Laves phases is subjected to a large degree of freedom [38] it is impossible to reveal the exact stoichiometry of the phase and the exact distribution of atoms on the available sites in the unit cell with the current measurements.…”

“…The values are in good agreement with data published in the literature: Altounian et al [16] for instance reported a Kissinger activation energy of 4.5 eV for Cu 50 Zr 50 . Yet, for Cu 50 Zr 40 Ti 10 activation energies of 516 kJ/mol (5.3 eV) [37] and 480 kJ/mol (4.9 eV) [64] have been measured. Both values are considerably higher than the value of 422 kJ/mol (4.4 eV) obtained in the present work.…”

“…Petrzhik et al [37] suggested the coexistence of the C15 phase and its 14H polytype (P-3m1). Yet, P-3m1 is no subgroup of the Fd-3m space group and thus must be ruled out.…”