Transition from high-entropy to conventional $(TiZrNbCu{)}_{1-x}C{o}_x$ metallic glasses

Abstract

A new amorphous alloy system $(TiZrNbCu{)}_{1-x}C{o}_x$ covering a broad composition range from the high-entropy (HEA) to Co rich alloys (x$⩽$ 0.43) has been fabricated, characterized and investigated. A comprehensive study of the chemical compositions, homogeneity, thermal stability, electronic structure and magnetic and mechanical properties has been performed. All properties change their variations with x within the HEA range. In particular, the average atomic volume deviates from the Vegard's law for x$\ge 0.2$, where also the average atomic packing fraction suddenly changes. The valence band structure, studied with ultraviolet photoemission spectroscopy, shows a split-band shape with 3d-states of Co approaching the Fermi level on increasing x. Due to onset of magnetic correlations magnetic susceptibility rapidly increases for x$\ge 0.25$. Very high microhardness increases rapidly with x. The results are compared with those for similar binary and quinary metallic glasses and with those for Cantor type of crystalline alloys.

29 pages, 10 figures

References in corpus (4)

• Effect of Electron Count and Chemical Complexity in the Ta-Nb-Hf-Zr-Ti High-Entropy Alloy Superconductor
• Electronic structure and properties of (TiZrNbCu)_1-xNi_x high entropy amorphous alloys
• Electronic structure and glass forming ability in early and late transition metal alloys
• Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)(1-x)Ni(x) alloys

Cited by in corpus (2)

• Electronic structure-property relationship in an Al0.5TiZrPdCuNi high-entropy alloy
• Comment on: High Mixing Entropy Enhanced Energy States in Metallic Glasses