The rapid growth of He nanobubbles in vicinity of the axis of W nanofibers under fusion-relevant He ion irradiations

被引：3

作者：

Niu, Chunjie ^{[1
]}

Lv, Jianhua ^{[1
]}

Cui, Yunqiu ^{[1
]}

Liu, Weifeng ^{[1
]}

Zhao, Zilu ^{[1
]}

Song, Jiupeng ^{[2
]}

Chen, Chao ^{[1
]}

Zhang, Yang ^{[1
]}

Ni, Weiyuan ^{[1
]}

Fan, Hongyu ^{[1
,3
]}

Dai, Shuyu ^{[4
]}

Lei, Guangjiu ^{[5
]}

Liu, Dongping ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Elect Engn, Dalian 116024, Peoples R China

[2] Xiamen Tungsten Co Ltd, China Natl R&D Ctr Tungsten Technol, Xiamen, Peoples R China

[3] Dalian Minzu Univ, Sch Phys & Mat Engn, Dalian 116600, Peoples R China

[4] Dalian Univ Technol, Sch Phys, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China

[5] Southwestern Inst Phys SWIP, Chengdu 610225, Sichuan, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2022年 / 572卷

基金：

美国国家科学基金会; 国家重点研发计划;

关键词：

He plus irradiations; W nanofibers; He bubble; Reaction rate model; TUNGSTEN;

D O I：

10.1016/j.jnucmat.2022.154062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The He nanobubbles growth is one of the key factors in affecting surface microstructures of tungsten -based divertor targets. In this work, the growth of He bubbles in W nanofibers has been studied based on He diffusion and reaction rate model. Computational results show that the He bubbles tend to grow rapidly in vicinity of the axis of W nanofibers due to the diffusion and trapping of solute He atoms in W nanofibers while the nanobubbles in W bulk mainly grow in the near-surface layer. Decreasing the radius of W nanofibers and increasing He + energy can significantly contribute to the growth of the He bubbles in vicinity of the axis of W nanofibers, which has been confirmed by our TEM measurements. The continuous growth of He bubbles in W nanofibers can not only lead to the tensile driven cracking but also the thinning of W nanofibers. (c) 2022 Elsevier B.V. All rights reserved.

引用

页数：11

共 18 条

[1] The evolution of He nanobubbles in tungsten under fusion-relevant He ion irradiation conditions
Bi, Zhenhua
Liu, Dongping
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Liu, Lu
Xia, Yang
Hong, Yi
Fan, Hongyu
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NUCLEAR FUSION, 2019, 59 (08)
[2] Effect of temperature on the growth and surface bursting of He nano-bubbles in W under fusion-relevant He ion irradiations
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Zhang, Yang
Cui, Yunqiu
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Ni, Weiyuan
Fan, Hongyu
Lu, Na
Benstetter, Guenther
Lei, Guangjiu
Liu, Dongping
FUSION ENGINEERING AND DESIGN, 2021, 163
[3] The heat flux and temperature distribution of W fuzz layers under fusion-relevant He/D ion irradiations
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[4] W fuzz layers: very high resistance to sputtering under fusion-relevant He + irradiations
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[5] Tensile stress-driven cracking of W fuzz over W crystal under fusion-relevant He ion irradiations
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[6] W fuzz layers: very high resistance to sputtering under fusion-relevant He~+ irradiations
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[7] The effect of fusion-relevant He ion flux on the evolution of He nano-bubbles in W
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[8] Effects of He+ energy and W temperature on the initial W fuzz growth under the fusion-relevant He+ irradiation
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JOURNAL OF NUCLEAR MATERIALS, 2025, 606
[9] Effects of He+ energy and irradiation temperature on W sputtering yields under fusion-relevant conditions
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[10] The fracture and merging of W nanofibers under low-energy He ion irradiations at an elevated temperature
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