Pre-crystallization and recrystallization kinetics of melt-quenched Se78Te20Sn2and Se76Te20Sn2M2(M = Ge, In, Pb, Sb) glass–ceramic alloys

Abstract

This study explores the impact of Ge, In, Pb, and Sb additives on the kinetic behaviors of pre-recrystallization and recrystallization in Se<inf>78</inf>Te<inf>20</inf>Sn<inf>2</inf> alloys. Non-isothermal calorimetric experiments were conducted to determine the glass transition temperature (T<inf>g</inf>), recrystallization onset temperature (T<inf>o</inf>), peak temperature (T<inf>c</inf>), and associated activation energies (E<inf>g</inf>, E<inf>c</inf>). Parameters such as Lasocka's coefficients (A<inf>g</inf>, B<inf>g</inf>, A<inf>c</inf>, B<inf>c</inf>), recrystallization rate constant (K), Hruby number (H<inf>r</inf>), and thermal stability (S) were evaluated to assess the glass-forming tendencies and resistance to devitrification. Additives significantly influenced T<inf>g</inf>, T<inf>c</inf>, and E<inf>c</inf>, with Sb yielding the highest thermal stability and glass-forming ability. Stability criteria based on the Arrhenius rate constant K(T) highlighted the correlation between configurational changes and energy barriers. These findings offer insights into thermal behavior, enabling the design of tailored glass–ceramic alloys for advanced applications. This journal is © The Royal Society of Chemistry, 2025