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Positron annihilation Doppler broadening spectroscopy study on Fe-ion irradiated NHS steel
Zhu, HP; Wang, ZG; Gao, X; Cui, MH; Li, BS; Sun, JR; Yao, CF; Wei, KF; Shen, TL; Pang, LL; Zhu, YB; Li, YF; Wang, J; Song, P; Zhang, P; Cao, XZ; 张鹏(正); Cao XZ(曹兴忠)
2015
发表期刊NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷号344页码:5-10
摘要In order to study the evolution of irradiation-induced vacancy-type defects at different irradiation fluences and temperatures, a new type of ferritic/martensitic (F/M) steel named NHS (Novel High Silicon) was irradiated by 3.25 MeV Fe-ion at room temperature and 723 K to fluences of 4.3 x 10(15) and 1.7 x 10(16) ions/cm(2). After irradiation, vacancy-type defects were investigated with variable-energy positron beam Doppler broadening spectra. Energetic Fe-ions produced a large number of vacancy-type defects in the NHS steel, but one single main type of vacancy-type defect was observed in both unirradiated and irradiated samples. The concentration of vacancy-type defects decreased with increasing temperature. With the increase of irradiation fluence, the concentration of vacancy-type defects increased in the sample irradiated at RT, whereas for the sample irradiated at 723 K, it decreased. The enhanced recombination between vacancies and excess interstitial Fe atoms from deeper layers, and high diffusion rate of self-interstitial atoms further improved by diffusion via grain boundary and dislocations at high temperature, are thought to be the main reasons for the reversed trend of vacancy-type defects between the samples irradiated at RT and 723 K. (C) 2014 Elsevier B.V. All rights reserved.
文章类型Article
关键词F/M steel Fe-ion irradiation Positron annihilation spectroscopy Vacancy-type defects
学科领域Instruments & Instrumentation; Nuclear Science & Technology; Physics
DOI10.1016/j.nimb.2014.11.051
收录类别SCI ; EI
WOS类目Instruments & Instrumentation ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical ; Physics, Nuclear
WOS记录号WOS:000349583000002
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228118
专题多学科研究中心
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GB/T 7714
Zhu, HP,Wang, ZG,Gao, X,et al. Positron annihilation Doppler broadening spectroscopy study on Fe-ion irradiated NHS steel[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2015,344:5-10.
APA Zhu, HP.,Wang, ZG.,Gao, X.,Cui, MH.,Li, BS.,...&曹兴忠.(2015).Positron annihilation Doppler broadening spectroscopy study on Fe-ion irradiated NHS steel.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,344,5-10.
MLA Zhu, HP,et al."Positron annihilation Doppler broadening spectroscopy study on Fe-ion irradiated NHS steel".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 344(2015):5-10.
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