Transition from high-entropy to conventional $(TiZrNbCu)_{1-x}Co_x$ metallic glasses
| Autor: | Emil Babić, Ignacio A. Figueroa, Vesna Mikšić Trontl, Krešo Zadro, Ramir Ristić, Petar Pervan, Amra Salčinović Fetić |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Metallic glasses
High entropy alloys Atomic structure Condensed Matter - Materials Science Amorphous metal Materials science Condensed matter physics Photoemission spectroscopy Fermi level General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Quinary Electronic structure Atomic packing factor Magnetic susceptibility symbols.namesake symbols Van der Waals radius |
| Popis: | A new amorphous alloy system $(TiZrNbCu)_{1-x}Co_x$ covering a broad composition range from the high-entropy (HEA) to Co rich alloys (x$\leqslant$ 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 |
| Databáze: | OpenAIRE |
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