Electronic structure and properties of (TiZrNbCu)1-xNix high entropy amorphous alloys

Biljaković, Katica; Reményi, G.; Figueroa, I.A.; Ristić, Ramir; Pajić, Damir; Kuršumović, A.; Starešinić, Damir; Zadro, Krešo; Babić, Emil

doi:10.1016/j.jallcom.2016.11.179

Cited by 18 publications

(113 citation statements)

References 60 publications

(171 reference statements)

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“…Therefore, the samples with x = 0 and 0.55 were not used in further studies. Details of the characterization of fully amorphous samples including their XRD patterns, SEM/EDS images and DSC curves were recently published [19,22,24]. We note that all these samples showed homogeneous distribution of elements with actual compositions close to nominal ones.…”

Section: Methodsmentioning

confidence: 82%

“…Thin ribbons with thickness of about 20 µm were fabricated from fragments of these alloys by melt spinning molten alloys on the surface of a copper roller in a pure He atmosphere [19,22]. Detailed description of the methods employed for structural (X-ray powder diffraction, XRD), chemical (scanning electron microscopy with energy dispersive spectroscopy, SEM/EDS) and thermal (differential scanning calorimetry and thermogravimetric analysis, DSC-TGA) characterisation of all alloys was reported previously [19,22,24].…”

Section: Methodsmentioning

confidence: 99%

“…However, present research of HEAs seems somewhat uneven, with the main effort invested in the development of new structural materials, thus focused on their mechanical properties, microstructure and thermal stability (e.g., [5,14,17]). Meanwhile, the research aimed at their electronic structures and properties, both experimental [5,18,19,20,21,22,23,24] and theoretical [5,25,26,27,28,29], is in spite of their potential as functional materials [5] still insufficient. The lack of insight into their electronic structure which in metallic systems determines almost all their properties (e.g., [30,31]) hinders the conceptual understanding of both crystalline (c-) and amorphous (a-) HEAs [19,24].…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the research aimed at their electronic structures and properties, both experimental [5,18,19,20,21,22,23,24] and theoretical [5,25,26,27,28,29], is in spite of their potential as functional materials [5] still insufficient. The lack of insight into their electronic structure which in metallic systems determines almost all their properties (e.g., [30,31]) hinders the conceptual understanding of both crystalline (c-) and amorphous (a-) HEAs [19,24]. Furthermore, the distribution of research on HEAs in regards to their composition is highly uneven, with studies of HEAs based on 3d-metals forming a large majority, while there are only a few studies on HEAs composed of early and late transition metals (e.g., [1,2,5,17,19,22,24,32]).…”

Section: Introductionmentioning

confidence: 99%

“…The lack of insight into their electronic structure which in metallic systems determines almost all their properties (e.g., [30,31]) hinders the conceptual understanding of both crystalline (c-) and amorphous (a-) HEAs [19,24]. Furthermore, the distribution of research on HEAs in regards to their composition is highly uneven, with studies of HEAs based on 3d-metals forming a large majority, while there are only a few studies on HEAs composed of early and late transition metals (e.g., [1,2,5,17,19,22,24,32]). In general, in spite of their early appearance [1,2] and large conceptual importance [17,24,32] research of a-HEAs lags well behind that of c-HEAs.…”

Section: Introductionmentioning

confidence: 99%

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Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Kuveždić

Tafra

Basletić

et al. 2020

Journal of Non-Crystalline Solids

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We present results of comprehensive study of electronic properties of (TiZrNbCu) 1−x Ni x metallic glasses performed in broad composition range x encompassing both, high entropy (HE) range, and conventional Ni-base alloy concentration range, x ≥ 0.35. The electronic structure studied by photoemission spectroscopy and low temperature specific heat (LTSH) reveal a split-band structure of density of states inside valence band with d-electrons of Ti, Zr, Nb and also Ni present at Fermi level N (E F ), whereas LTSH and magnetoresistivity results show that variation of N (E F ) with x changes in Ni-base regime. The variation of superconducting transition temperatures with x closely follows that of N (E F ). The electrical resistivities of all alloys are high and decreasewith increasing temperature over most of explored temperature range, and their temperature dependence seems dominated by weak localization effects over a broad temperature range (10 − 300 K). The preliminary study of Hall

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Section: Methodsmentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Kuveždić

Tafra

Basletić

et al. 2020

Journal of Non-Crystalline Solids

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Phase Selection, Lattice Distortions, and Mechanical Properties in High‐Entropy Alloys

et al. 2020

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Increasing demand for improved physical, chemical, and mechanical properties led to the development of conventional alloys from single elements. These conventional alloys are made by selecting one or two major elements with desired properties, and other minor components are added to tune the properties to meet performance specifications. The conventional alloy design strategy is mainly based on the "solutesolvent" principle. However, another alloy design strategy based on multiprincipal elements in the near-equimolar ratio has recently been developed. In this multiprincipal element system, it is difficult to distinguish between the solute and the solvent, and various atoms are supposed to be randomly distributed in the crystal lattices (which has not been confirmed yet). This strategy, proposed by Yeh [1] and Cantor, [2] was based on the Boltzmann hypothesis of the relationship between entropy and system complexity. They proposed that the increased configurational entropy of mixing in alloys with multiple alloying elements in near-equiatomic proportions would overcome the enthalpy of compound formation, stabilizing solid solutions (SS) at the expense of intermetallics (IMs) during solidification. These multiprincipal element alloys are named "high entropy alloys" (HEAs), although the exact values of entropy in HEAs have not been experimentally measured yet. Since then, hundreds of HEAs with different combinations have been developed based on transition metals, refractory metals, and compound forming elements. [2-20] Most of these HEAs have been found to possess simple crystal structures such as the face-centered cubic (fcc) Fe-Co-Cr-Mn-Ni HEAs, [2] bodycentered cubic (bcc) Al-Co-Cr-Fe-Ni HEAs, [18] and the hexagonal close-pack (hcp) Ho-Dy-Y-Gd-Tb HEAs [6] when solidified from the melts. Experimental characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), nanoindentation, tensile, wear-and corrosionresistance tests have been used to study the microstructureproperties correlations of HEAs. [3-50] These studies have revealed that HEAs possess superior properties, such as high hardness and strength, [23-29] superior corrosion and wear resistance, [3,30-35] good magnetic properties, [9,36-39,51] structural stability, [7,40,41] attractive mechanical properties at extreme temperature conditions, [21,42-47] and good electronic properties. [48,49] Yeh [50] proposed four core effects of HEAs, namely: 1) high-entropy effect; 2) sluggish diffusion effect; 3) sever lattice distortion effect; and 4) cocktail effect, in which the lattice distortion might be the key factor affecting the properties of HEAs. Although a complete understanding of lattice distortions in HEAs is still not established yet, significant progress in HEAs has been made recently.

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Entropy versus enthalpy in hexagonal-close-packed high-entropy alloys

et al. 2022

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Electronic structure and properties of (TiZrNbCu)1-xNix high entropy amorphous alloys

Cited by 18 publications

References 60 publications

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Phase Selection, Lattice Distortions, and Mechanical Properties in High‐Entropy Alloys

Entropy versus enthalpy in hexagonal-close-packed high-entropy alloys

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