Transition from high-entropy to Cu-based (TiZrNbNi)1−xCux metallic glasses

DOI: 10.1063/1.5119373

Authors: Ramir Ristić (University of Osijek) , Ignacio A. Figueroa (Ciudad Universitaria Coyoacan) , Andrea Lachova (P.J. Šafárik University in Košice) , Stefan Michalik (Diamond Light Source) , Vesna Mikšić Trontl (Institute of Physics, Zagreb) , Petar Pervan (Institute of Physics, Zagreb) , Krešo Zadro (University of Zagreb) , Damir Pajić (University of Zagreb) , Emil Babić (University of Zagreb)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Physics , VOL 126

State: Published (Approved)
Published: October 2019
Diamond Proposal Number(s): 21642

Abstract: A study of a transition from conventional multicomponent alloys to high-entropy alloys (HEAs) is important both for understanding the formation of HEAs and for proper evaluation of their potential with respect to that of conventional alloys. We report the main result of such a study performed on (TiZrNbNi)1−xCux metallic glasses (MG) over a broad concentration range x ≤ 0.52 encompassing both high entropy-MGs and Cu-based MGs. A comprehensive study of the composition, homogeneity, thermal stability, atomic structure, electronic structure, and magnetic susceptibility of 11 alloys has been performed. Thermal analysis revealed a rather weak variation of thermal parameters and glass forming ability with x. The study of the atomic structure showed a linear variation of average interatomic distances and atomic volumes close to those predicted by Vegard’s law. The coordination numbers and atomic packing fractions were constant throughout the explored concentration range. The electronic density of states (DOS) showed a split-band structure with DOS close to the Fermi level dominated with d-states of Ti, Zr, and Nb. Accordingly, magnetic susceptibility decreased linearly with x and extrapolated to that of Cu. Thus, the studied alloys show ideal solution behavior similar to that of binary Cu-Ti, Zr, and Hf MGs. The results are compared with those for (TiZrNbCu)1−xNix MGs and (CrMnFeCo)1−xNix alloys and their impact on understanding the transition from high-entropy-MGs to conventional MGs with the same composition is briefly discussed.

Journal Keywords: Amorphous materials; Materials properties; Magnetic susceptibility; Alloys; Thermal analysis; Entropy; Electronic band structure

Diamond Keywords: Alloys

Subject Areas: Materials, Physics


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 23/11/2019 10:08

Discipline Tags:

Physics Hard condensed matter - structures Materials Science Composite Materials Metallurgy

Technical Tags:

Diffraction