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

Matheus Araujo Tunes, Vladimir Vishnyakov, Stephen Donnelly

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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.
LanguageEnglish
Pages115-120
Number of pages6
JournalThin Solid Films
Volume649
DOIs
Publication statusPublished - 1 Mar 2018

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Nuclear fuel cladding
nuclear fuels
Entropy
entropy
coatings
Thin films
Coatings
synthesis
thin films
Sputter deposition
Silicon
Chemical analysis
atomic structure
Ion beams
high current
Nucleation

Cite this

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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 = "3",
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",

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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

T2 - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

ER -