Thermodynamic and mechanical properties of Co–Fe–Ni–Zn–P multicomponent metallic nanoglasses: Some insight into the entropy-stabilized glass–glass interfaces

• Entropy-stabilized glass–glass interfaces (GGIs) in Co–Fe–Ni–Zn–P nanoglasses exhibit reduced excess free volumes compared to glassy grain interiors, enhancing thermodynamic stability. • The high entropy of mixing (1.32R) in the GGI regions stabilizes atomic structures and improves glass-forming ability of the multicomponent nanoglasses. • Nanoindentation and creep tests reveal notable enhancements in both ductility and mechanical strength of Co–Fe–Ni–Zn–P nanoglasses due to entropy-stabilized GGIs. • This work provides a novel strategy for strengthening metallic nanoglasses through GGI engineering, offering an alternative to conventional methods.