Study on vacancy-type defects in SIMP steel induced by separate and sequential H and He ion implantation

被引：26

作者：

Jin, Peng ^{[1
,2
]}

Shen, Tielong ^{[1
,2
]}

Cui, Minghuan ^{[1
,2
]}

Zhu, Yabin ^{[1
,2
]}

Li, Bingsheng ^{[1
]}

Zhang, Tongmin ^{[1
]}

Li, Jinyu ^{[1
]}

Jin, Shuoxue ^{[3
]}

Lu, Eryang ^{[3
]}

Cao, Xingzhong ^{[3
]}

Wang, Zhiguang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2019年 / 520卷

基金：

中国国家自然科学基金;

关键词：

Helium/hydrogen implantation; Positron annihilation; Vacancy defects; SIMP steel; FERRITIC/MARTENSITIC STEEL; IRRADIATION CONDITIONS; HYDROGEN; HELIUM; FUSION; RETENTION; DEUTERIUM; EVOLUTION; FISSION; METALS;

D O I：

10.1016/j.jnucmat.2019.04.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To provide a basic understanding of the synergy effect of hydrogen and helium on structural materials for future advanced nuclear systems, the vacancy-type defects in SIMP steel induced by separate and sequential H and He implantation at room temperature was investigated using positron annihilation Doppler broadening spectroscopy (DBS) and transmission electron microscopy (TEM). The DBS results indicated that, when implanted by H and He separately, the Delta S parameter of the H-implanted sample was greater than that of He, although the damage level (that is, the displacement per atom) induced by H was lower than that induced by He. This could indicate that He is more easily trapped by vacancy than H and prefers to occupy the center of the vacancy. When sequentially co-implanted by He and H, whatever the implantation sequence, the Delta S parameter was lower than that of H-only implantation. In addition, the Delta S parameter of sequential He + H implantation was greater than that of H + He implantation when the dose of H was sufficiently high. Combined with the TEM results, the synergistic effects of He and H on vacancy-type defect evolution are discussed. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：131 / 139

页数：9

共 33 条

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