Synthesis and characterisation of high-entropy alloy thin films as candidates for coating nuclear fuel cladding alloys

Matheus Araujo Tunes; Vladimir Vishnyakov; Stephen Donnelly

doi:10.1016/j.tsf.2018.01.041

Synthesis and characterisation of high-entropy alloy thin films as candidates for coating nuclear fuel cladding alloys

Matheus Araujo Tunes, Vladimir Vishnyakov, Stephen Donnelly

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

27 Citations (Scopus)

Abstract

Thin films of the quaternary system FeCrMnNi were synthesised by ion beam sputter-deposition. The films were deposited on a silicon substrate at approximately 350 K. A high-entropy alloy thin film (HEATF) and a non-equiatomic thin film were obtained. Energy Dispersive X-ray Spectroscopy (EDX) and Transmission Electron Microscopy (TEM) were used to determine thin film composition and the atomic structure. The non-equiatomic thin film exhibited a polycrystalline structure with nanometre-sized grains. Microstructural analysis of the HEATF, which had close to equimolar composition, showed large crystals and planar defects. The microstructural differences between the HEATF and the non-equiatomic thin film are discussed in terms of current high-entropy alloy theory, previous work on thin films and nucleation theory.

Original language	English
Pages (from-to)	115-120
Number of pages	6
Journal	Thin Solid Films
Volume	649
DOIs	https://doi.org/10.1016/j.tsf.2018.01.041
Publication status	Published - 1 Mar 2018

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@article{103a0e74d3364289941be0816ecafe66,

title = "Synthesis and characterisation of high-entropy alloy thin films as candidates for coating nuclear fuel cladding alloys",

abstract = "Thin films of the quaternary system FeCrMnNi were synthesised by ion beam sputter-deposition. The films were deposited on a silicon substrate at approximately 350 K. A high-entropy alloy thin film (HEATF) and a non-equiatomic thin film were obtained. Energy Dispersive X-ray Spectroscopy (EDX) and Transmission Electron Microscopy (TEM) were used to determine thin film composition and the atomic structure. The non-equiatomic thin film exhibited a polycrystalline structure with nanometre-sized grains. Microstructural analysis of the HEATF, which had close to equimolar composition, showed large crystals and planar defects. The microstructural differences between the HEATF and the non-equiatomic thin film are discussed in terms of current high-entropy alloy theory, previous work on thin films and nucleation theory.",

keywords = "Accident tolerant fuels, Energy dispersive X-ray spectroscopy, High entropy alloys, Ion-beam sputter-deposition, Transmission electron microscopy",

author = "Tunes, {Matheus Araujo} and Vladimir Vishnyakov and Stephen Donnelly",

year = "2018",

month = mar,

day = "1",

doi = "10.1016/j.tsf.2018.01.041",

language = "English",

volume = "649",

pages = "115--120",

journal = "Thin Solid Films",

issn = "0040-6090",

publisher = "Elsevier",

}

TY - JOUR

T1 - Synthesis and characterisation of high-entropy alloy thin films as candidates for coating nuclear fuel cladding alloys

AU - Tunes, Matheus Araujo

AU - Vishnyakov, Vladimir

AU - Donnelly, Stephen

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Thin films of the quaternary system FeCrMnNi were synthesised by ion beam sputter-deposition. The films were deposited on a silicon substrate at approximately 350 K. A high-entropy alloy thin film (HEATF) and a non-equiatomic thin film were obtained. Energy Dispersive X-ray Spectroscopy (EDX) and Transmission Electron Microscopy (TEM) were used to determine thin film composition and the atomic structure. The non-equiatomic thin film exhibited a polycrystalline structure with nanometre-sized grains. Microstructural analysis of the HEATF, which had close to equimolar composition, showed large crystals and planar defects. The microstructural differences between the HEATF and the non-equiatomic thin film are discussed in terms of current high-entropy alloy theory, previous work on thin films and nucleation theory.

AB - Thin films of the quaternary system FeCrMnNi were synthesised by ion beam sputter-deposition. The films were deposited on a silicon substrate at approximately 350 K. A high-entropy alloy thin film (HEATF) and a non-equiatomic thin film were obtained. Energy Dispersive X-ray Spectroscopy (EDX) and Transmission Electron Microscopy (TEM) were used to determine thin film composition and the atomic structure. The non-equiatomic thin film exhibited a polycrystalline structure with nanometre-sized grains. Microstructural analysis of the HEATF, which had close to equimolar composition, showed large crystals and planar defects. The microstructural differences between the HEATF and the non-equiatomic thin film are discussed in terms of current high-entropy alloy theory, previous work on thin films and nucleation theory.

KW - Accident tolerant fuels

KW - Energy dispersive X-ray spectroscopy

KW - High entropy alloys

KW - Ion-beam sputter-deposition

KW - Transmission electron microscopy

U2 - 10.1016/j.tsf.2018.01.041

DO - 10.1016/j.tsf.2018.01.041

M3 - Article

VL - 649

SP - 115

EP - 120

JO - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

ER -

Synthesis and characterisation of high-entropy alloy thin films as candidates for coating nuclear fuel cladding alloys

Abstract

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