Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions

Kun Wang; Yonggang Yan; Yaoxu Xiong; Shijun Zhao; Di Chen; Kevin B. Woller

doi:10.1016/j.jnucmat.2023.154761

Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions

Kun Wang^*, Yonggang Yan, Yaoxu Xiong, Shijun Zhao, Di Chen, Kevin B. Woller

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

Recently, high entropy alloy (HEA) has demonstrated superior radiation resistance to energetic particles. In this paper, we examine the radiation response of W-based HEA (WMoTaVNb) under the low-energy helium plasma exposure. As compared to pure W, WMoTaVNb demonstrated significant suppression in surface nanofuzz growth after the 65 eV helium plasma exposure to the same fluence (2 × 10²⁴ He/m²). In addition, the 1 MeV helium ion implantation results present the sluggish helium bubble growth in W-based HEA, which is suspected to be the dominant cause to delay the nanofuzz growth. These results are further interpreted by comparing the transport of interstitial defects toward the surface regions in both pure W and W-based HEA via the molecular dynamic (MD) atomistic simulations. Our results show that due to chemical complexity, defect diffusion is highly localized in HEA, suggesting that the sluggish motion of interstitial defects may play another critical role in delaying surface nanofuzz growth if trap mutation and surface adatom formation mechanism dominates the fuzz growth.

© 2023 Elsevier B.V. All rights reserved.

Original language	English
Article number	154761
Journal	Journal of Nuclear Materials
Volume	588
Online published	1 Oct 2023
DOIs	https://doi.org/10.1016/j.jnucmat.2023.154761
Publication status	Published - Jan 2024

Funding

Kun Wang and Yonggang Yan are supported by the Faculty Startup Fund in the School of Engineering at Alfred University. The Thermo Fisher Scientific (FEI) Scios™ 2 DualBeam ultra-high-resolution analytical FIB-SEM system is supported by the National Science Foundation under Grant No. 2018306 . Shijun Zhao acknowledges the Research Grants Council of Hong Kong (Grant No. 11200421 ). Kevin B. Woller acknowledges the support from Department of Energy, Office of Science (Grant No. DE-SC0021637 ).

Research Keywords

Electron microscopy
Helium ion irradiation
Molecular dynamics
W-based high entropy alloy

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title = "Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions",

abstract = "Recently, high entropy alloy (HEA) has demonstrated superior radiation resistance to energetic particles. In this paper, we examine the radiation response of W-based HEA (WMoTaVNb) under the low-energy helium plasma exposure. As compared to pure W, WMoTaVNb demonstrated significant suppression in surface nanofuzz growth after the 65 eV helium plasma exposure to the same fluence (2 × 1024 He/m2). In addition, the 1 MeV helium ion implantation results present the sluggish helium bubble growth in W-based HEA, which is suspected to be the dominant cause to delay the nanofuzz growth. These results are further interpreted by comparing the transport of interstitial defects toward the surface regions in both pure W and W-based HEA via the molecular dynamic (MD) atomistic simulations. Our results show that due to chemical complexity, defect diffusion is highly localized in HEA, suggesting that the sluggish motion of interstitial defects may play another critical role in delaying surface nanofuzz growth if trap mutation and surface adatom formation mechanism dominates the fuzz growth.{\textcopyright} 2023 Elsevier B.V. All rights reserved.",

keywords = "Electron microscopy, Helium ion irradiation, Molecular dynamics, W-based high entropy alloy",

author = "Kun Wang and Yonggang Yan and Yaoxu Xiong and Shijun Zhao and Di Chen and Woller, {Kevin B.}",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2024",

month = jan,

doi = "10.1016/j.jnucmat.2023.154761",

language = "English",

volume = "588",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

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T1 - Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions

AU - Wang, Kun

AU - Yan, Yonggang

AU - Xiong, Yaoxu

AU - Zhao, Shijun

AU - Chen, Di

AU - Woller, Kevin B.

PY - 2024/1

Y1 - 2024/1

N2 - Recently, high entropy alloy (HEA) has demonstrated superior radiation resistance to energetic particles. In this paper, we examine the radiation response of W-based HEA (WMoTaVNb) under the low-energy helium plasma exposure. As compared to pure W, WMoTaVNb demonstrated significant suppression in surface nanofuzz growth after the 65 eV helium plasma exposure to the same fluence (2 × 1024 He/m2). In addition, the 1 MeV helium ion implantation results present the sluggish helium bubble growth in W-based HEA, which is suspected to be the dominant cause to delay the nanofuzz growth. These results are further interpreted by comparing the transport of interstitial defects toward the surface regions in both pure W and W-based HEA via the molecular dynamic (MD) atomistic simulations. Our results show that due to chemical complexity, defect diffusion is highly localized in HEA, suggesting that the sluggish motion of interstitial defects may play another critical role in delaying surface nanofuzz growth if trap mutation and surface adatom formation mechanism dominates the fuzz growth.© 2023 Elsevier B.V. All rights reserved.

AB - Recently, high entropy alloy (HEA) has demonstrated superior radiation resistance to energetic particles. In this paper, we examine the radiation response of W-based HEA (WMoTaVNb) under the low-energy helium plasma exposure. As compared to pure W, WMoTaVNb demonstrated significant suppression in surface nanofuzz growth after the 65 eV helium plasma exposure to the same fluence (2 × 1024 He/m2). In addition, the 1 MeV helium ion implantation results present the sluggish helium bubble growth in W-based HEA, which is suspected to be the dominant cause to delay the nanofuzz growth. These results are further interpreted by comparing the transport of interstitial defects toward the surface regions in both pure W and W-based HEA via the molecular dynamic (MD) atomistic simulations. Our results show that due to chemical complexity, defect diffusion is highly localized in HEA, suggesting that the sluggish motion of interstitial defects may play another critical role in delaying surface nanofuzz growth if trap mutation and surface adatom formation mechanism dominates the fuzz growth.© 2023 Elsevier B.V. All rights reserved.

KW - Electron microscopy

KW - Helium ion irradiation

KW - Molecular dynamics

KW - W-based high entropy alloy

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DO - 10.1016/j.jnucmat.2023.154761

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85173147135

SN - 0022-3115

VL - 588

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 154761

ER -

Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions

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GRF: Irradiation Damage Mechanism of Multicomponent Transition Metal Carbides

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Enhanced radiation resistance of W-based HEA under helium-ion irradiation conditions

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GRF: Irradiation Damage Mechanism of Multicomponent Transition Metal Carbides

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