Phase stability and possible superconductivity of new 4d and 5d transition metal high-entropy alloys

Alexander J. Browne; Denver P. Strong; Robert J. Cava

doi:10.1016/j.jssc.2023.123881

Phase stability and possible superconductivity of new 4d and 5d transition metal high-entropy alloys

Alexander J. Browne, Denver P. Strong, Robert J. Cava

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We report the synthesis of new equimolar high-entropy alloys formed from five or six 4d/5d transition metals that are each from a different Group of the Periodic Table. These include MoReRuRhPt and MoReRuIrPt, which appear to crystallise as single hexagonal close-packed phases and so are isostructural and isoelectronic to the high-pressure phase of the well-known high-entropy alloy CrMnFeCoNi. Other compositions crystallise as mixed phases, which we rationalise using the atomic size difference, δ, and the electronegativity difference, Δχ, of the constituent elements. Finally, we find signs of superconductivity in eight of these new systems.

Original language	English (US)
Article number	123881
Journal	Journal of Solid State Chemistry
Volume	321
DOIs	https://doi.org/10.1016/j.jssc.2023.123881
State	Published - May 2023

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Hexagonal close-packed
High-entropy alloys
Materials design
New materials
Superconductivity
σ phase

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10.1016/j.jssc.2023.123881

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title = "Phase stability and possible superconductivity of new 4d and 5d transition metal high-entropy alloys",

abstract = "We report the synthesis of new equimolar high-entropy alloys formed from five or six 4d/5d transition metals that are each from a different Group of the Periodic Table. These include MoReRuRhPt and MoReRuIrPt, which appear to crystallise as single hexagonal close-packed phases and so are isostructural and isoelectronic to the high-pressure phase of the well-known high-entropy alloy CrMnFeCoNi. Other compositions crystallise as mixed phases, which we rationalise using the atomic size difference, δ, and the electronegativity difference, Δχ, of the constituent elements. Finally, we find signs of superconductivity in eight of these new systems.",

keywords = "Hexagonal close-packed, High-entropy alloys, Materials design, New materials, Superconductivity, σ phase",

author = "Browne, {Alexander J.} and Strong, {Denver P.} and Cava, {Robert J.}",

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year = "2023",

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doi = "10.1016/j.jssc.2023.123881",

language = "English (US)",

volume = "321",

journal = "Journal of Solid State Chemistry",

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T1 - Phase stability and possible superconductivity of new 4d and 5d transition metal high-entropy alloys

AU - Browne, Alexander J.

AU - Strong, Denver P.

AU - Cava, Robert J.

PY - 2023/5

Y1 - 2023/5

N2 - We report the synthesis of new equimolar high-entropy alloys formed from five or six 4d/5d transition metals that are each from a different Group of the Periodic Table. These include MoReRuRhPt and MoReRuIrPt, which appear to crystallise as single hexagonal close-packed phases and so are isostructural and isoelectronic to the high-pressure phase of the well-known high-entropy alloy CrMnFeCoNi. Other compositions crystallise as mixed phases, which we rationalise using the atomic size difference, δ, and the electronegativity difference, Δχ, of the constituent elements. Finally, we find signs of superconductivity in eight of these new systems.

AB - We report the synthesis of new equimolar high-entropy alloys formed from five or six 4d/5d transition metals that are each from a different Group of the Periodic Table. These include MoReRuRhPt and MoReRuIrPt, which appear to crystallise as single hexagonal close-packed phases and so are isostructural and isoelectronic to the high-pressure phase of the well-known high-entropy alloy CrMnFeCoNi. Other compositions crystallise as mixed phases, which we rationalise using the atomic size difference, δ, and the electronegativity difference, Δχ, of the constituent elements. Finally, we find signs of superconductivity in eight of these new systems.

KW - Hexagonal close-packed

KW - High-entropy alloys

KW - Materials design

KW - New materials

KW - Superconductivity

KW - σ phase

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DO - 10.1016/j.jssc.2023.123881

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JF - Journal of Solid State Chemistry

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ER -

Phase stability and possible superconductivity of new 4d and 5d transition metal high-entropy alloys

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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