FeSiBAlNiMo High Entropy Alloy Prepared by Mechanical Alloying

R. Bureša, H. Hadraba b, M. Fáberová a, P. Kollár c, J. Füzer c, P. Roupcová b and M. Strečkováa aInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic bInstitute of Physics of Materials, Academy of Sciences of Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic cInstitute of Physics, Faculty of Science, P.J. Safarik University in Košice, Park Angelinum 9, 041 54 Košice, Slovak Republic

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High-entropy alloys have attracted increasing attentions because of their unique compositions, microstructures, and adjustable mechanical and functional properties. In this work, mechanical and magnetic properties of the FeSiBAlNiMo high-entropy alloy were studied in heat-treated conditions. Influence of temperature and time of sintering was investigated. The lowest coercivity Hc=370 A/m was reached at sintering temperature 580°C, during 20 min in Ar/10H2 atmosphere. Resistivity decreases from R=0.006 Ωcm at 580°C of sintering temperature to R=0.0004 Ωcm at temperature 1100°C. Transverse rupture strength TRS = 340 MPa as well as the Young modulus E=87 GPa were much higher in the case of sintering at 1100°C in comparison to TRS = 5 MPa and E=7.5 GPa at sintering temperature 580°C. Low temperature consolidation made possible to structure recovery and stress relief of amorphous-nanocrystalline structure. Higher temperature above 1100°C induced sintering processes and formation of complex borides.

DOI: 10.12693/APhysPolA.131.771 PACS numbers: 81.05.-t, 75.50.Tt, 75.50.Kj, 62.20.-x