Characterization of helium-vacancy complexes in He-ions implanted Fe9Cr by using positron annihilation spectroscopy

被引：24

作者：

Zhu, Te ^{[1
,2
]}

Jin, Shuoxue ^{[1
]}

Zhang, Peng ^{[1
]}

Song, Ligang ^{[1
,2
]}

Lian, Xiangyu ^{[1
]}

Fan, Ping ^{[3
]}

Zhang, Qiaoli ^{[3
]}

Yuan, Daqing ^{[3
]}

Wu, Haibiao ^{[4
]}

Yu, Runsheng ^{[1
]}

Cao, Xingzhong ^{[1
]}

Xu, Qiu ^{[5
]}

Wang, Baoyi ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Multidiscipline Res Ctr, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[3] China Inst Atom Energy, Beijing 102413, Peoples R China

[4] Univ South China, Affiliated Hosp 1, Hengyang 421001, Peoples R China

[5] Kyoto Univ, Res Reactor Inst, Kumatori, Osaka 5900494, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 505卷

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Helium-vacancy complexes; Alloy; Bubble nucleation; Positron annihilation technique; ACTIVATION FERRITIC/MARTENSITIC STEEL; MICROSTRUCTURAL EVOLUTION; MARTENSITIC STEEL; TEMPERATURE; DEPENDENCE; PROGRESS; FUSION; F82H;

D O I：

10.1016/j.jnucmat.2018.03.048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation of helium bubble precursors, i.e., helium-vacancy complexes, was investigated for Fe9Cr alloy, which was uniformly irradiated by using 100 keV helium ions with fluences up to 5x10(16) ions/cm(2) at RT, 523, 623, 723, and 873 K. Helium-irradiation-induced microstructures in the alloy were probed by positron annihilation technique. The results show that the ratio of helium atom to vacancy (m/n) in the irradiation induced HemVn clusters is affected by the irradiation temperature. Irradiated at room temperature, there is a coexistence of large amounts of HemV1 and mono-vacancies in the sample. However, the overpressured HemVn (m > n) clusters or helium bubbles are easily formed by the helium-filled vacancy clusters (HemV1 and HemVn (m approximate to n)) absorbing helium atoms when irradiated at 523 K and 823 K. The results also show that void swelling of the alloy is the largest under 723 K irradiation. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：69 / 72

页数：4

共 33 条

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