TY - JOUR

T1 - Design and characterization of novel Zr-Al-Fe-Y metallic glasses with nanoscale phase separation

AU - Singh, Devinder

AU - Parthiban, Ramasamy

AU - Jelinek, Anna

AU - Bhattacharya, Rahul

AU - Chen, Zhuo

AU - Fellner, Simon

AU - Gammer, Christoph

AU - Zhang, Zaoli

AU - Eckert, Jürgen

N1 - Publisher Copyright: © 2024

PY - 2024/5

Y1 - 2024/5

N2 - We present a new phase-separated Zr-based metallic glass (MG) composition, free of toxic elements (Ni and Cu) prepared in a glass-forming system by alloying addition. The substitution of Y in Zr 70- xAl 12.5Fe 17.5Y x (x = 0–15 at.%) results in phase separation, giving rise to nano-amorphous domains in a glassy matrix. A homogeneous MG feature is observed for low concentrations of Y up to x = 5. Microstructure and thermal property analysis indicate that the glasses with x = 10 and 15 at.% Y exhibit a typical liquid phase separation-induced two-glassy phase (Zr-rich and Y-rich) with droplet-like microstructures (nano-amorphous domains). With increasing Y addition, the domain size increases. The microstructural evolution arising due to phase separation in these alloys is confirmed by a combination of transmission electron microscopy (TEM) and atom probe tomography (APT) analysis. The formation of nanometer-size Y-enriched clusters is confirmed by APT for x = 15.

AB - We present a new phase-separated Zr-based metallic glass (MG) composition, free of toxic elements (Ni and Cu) prepared in a glass-forming system by alloying addition. The substitution of Y in Zr 70- xAl 12.5Fe 17.5Y x (x = 0–15 at.%) results in phase separation, giving rise to nano-amorphous domains in a glassy matrix. A homogeneous MG feature is observed for low concentrations of Y up to x = 5. Microstructure and thermal property analysis indicate that the glasses with x = 10 and 15 at.% Y exhibit a typical liquid phase separation-induced two-glassy phase (Zr-rich and Y-rich) with droplet-like microstructures (nano-amorphous domains). With increasing Y addition, the domain size increases. The microstructural evolution arising due to phase separation in these alloys is confirmed by a combination of transmission electron microscopy (TEM) and atom probe tomography (APT) analysis. The formation of nanometer-size Y-enriched clusters is confirmed by APT for x = 15.

KW - Metallic glasses

KW - Microstructure

KW - Nano-amorphous domain

KW - Phase separation

KW - Zr-alloys

UR - http://www.scopus.com/inward/record.url?scp=85191287550&partnerID=8YFLogxK

U2 - 10.1016/j.mtla.2024.102104

DO - 10.1016/j.mtla.2024.102104

M3 - Article

VL - 34.2024

JO - Materialia

JF - Materialia

SN - 2589-1529

IS - May

M1 - 102104

ER -