A new amorphous alloy system (TiZrNbCu)1−xCox 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≥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≥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.
@article{arxiv.2107.08239,
title = {Transition from high-entropy to conventional $(TiZrNbCu)_{1-x}Co_x$ metallic glasses},
author = {Ramir Ristić and Ignacio A. Figueroa and Amra Salčinović Fetić and Krešo Zadro and Vesna Mikšić Trontl and Petar Pervan and Emil Babić},
journal= {arXiv preprint arXiv:2107.08239},
year = {2022}
}