首页|Phase formation, microhardness and magnetic properties of FeNiCrV-TiNb, (NiCoFeCuMn)3(AlTi) and (FeNiCoCrMn)(MoCr) high entropy intermetallic compounds
Phase formation, microhardness and magnetic properties of FeNiCrV-TiNb, (NiCoFeCuMn)3(AlTi) and (FeNiCoCrMn)(MoCr) high entropy intermetallic compounds
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NSTL
Elsevier
High entropy intermetallic compounds (HEICs) are the most recent poster child of high entropy materials (HEMs), which provide a new paradigm to develop novel materials with potentially unusual properties. Here, FeNiCrV-TiNb, (Ni1/5-Co1/5-Fe1/5-Cu1/5-Mn1/5)3(Al1/2-Ti1/2), and (Fe1/5Ni1/5Co1/5Cr1/5Mn1/5)(Mo1/2Cr1/2) HEICs were fabricated by melting technique. The as-cast FeNiCrV-TiNb exhibited C14 Laves structure with varying chemical composition, which probably consists of two sub-lattices with slightly different lattice parameters. (Fe0.2Ni0.2Co0.2Cr0.2Mn0.2)(Mo0.5Cr0.5) crystalized into a single sigma-phase and revealed a homogenous microstructure with negligible segregation. A two-phase B2 +D03 structure with clear segregation of Cu, Fe, and Mn was obtained for (Ni0.2Co0.2Fe0.2Cu0.2Mn0.2)3(Al0.5Ti0.5) HEIC. The microhardness values were 915 Hv, 593 Hv, and 1051 Hv for FeNiCrV-TiNb, (Ni0.2Co0.2Fe0.2Cu0.2Mn0.2)3(Al0.5Ti0.5) and (Fe0.2Ni0.2Co0.2Cr0.2Mn0.2)(Mo0.5Cr0.5) HEICs, respectively. The last one is the highest value reported for an as-cast metallic HEM. (Ni0.2Co0.2Fe0.2Cu0.2Mn0.2)3(Al0.5Ti0.5) exhibited a soft magnetic behavior with a saturation magnetization of 27.7 emu/g and coercivity of ~ 311 Oe at 300 K, while FeNiCrV-TiNb and (Fe0.2Ni0.2Co0.2Cr0.2Mn0.2)(Mo0.5Cr0.5) showed an approximately linear dependency of magnetization vs. magnetic field. Finally, two modified parameters are introduced to expedite the discovery of new singlephase HEICs.
High entropy intermetallic compoundsMicrostructureMicrohardnessMagnetic propertiesSINGLE-PHASEALLOYSCR
NSTL
Elsevier
