High entropy alloys (FeCoNi)0.75Cr0.25-xCux – thermal stability and physical properties

0585635 - ÚFM 2025 RIV CH eng J - Journal Article
Brož, P. - Vřešťál, J. - Sopoušek, J. - Weiss, K. - Buršík, Jiří - Buršíková, V. - Záděra, A. - Müller, P. - Čupera, J. - Rogl, G. - Parzer, M. - Bauer, E. - Michor, H. - Rogl, P.F.
High entropy alloys (FeCoNi)0.75Cr0.25-xCux – thermal stability and physical properties.
Journal of Alloys and Compounds. Roč. 993, Jul (2024), č. článku 174628. ISSN 0925-8388. E-ISSN 1873-4669
Institutional support: RVO:68081723
Keywords : HEA * Phase equilibria * DSC * Physical properties * Density
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0925838824012155?via%3Dihub

The paper reports on the phase stability of the (FeCoNi)0.75Cr0.25-xCux HEA system with equimolar ratio of Fe, Co
and Ni by differential scanning calorimetry (DSC) and measurements of physicochemical properties: density,
electrical resistivity, Seebeck coefficient, thermal conductivity, and magnetic behaviour in a broad temperature
region as well as hardness and elastic modulus at room temperature as a function of the gradual substitution of
chromium by copper in a series of (FeCoNi)0.75Cr0.25-xCux alloys with different mole fraction of Cu (x = 0, 0.05,
0.1, 0.15 and 0.2). DSC measurements showed that all alloys are thermally stable. Increasing content of Cu was
found (i) to increase the formation of a fcc Cu-rich phase, (ii) to strengthen ferromagnetic interactions, resulting
in rising ordered magnetic moments, as well as in growing ferromagnetic transition temperatures, and (iii) to
distinctly change physical properties like electrical resistivity, thermal expansion, and mechanical properties.
Experimental data regarding the phase stability are supported by CALPHAD calculations.
Permanent Link: https://hdl.handle.net/11104/0353318