Vacancy-type defect production in CLAM steel after the co-implantation of He and H ion beams studied by positron-annihilation spectroscopy

Xin, Yong; Ju, Xin; Qiu, Jie; Guo, Liping; Li, Tiecheng; Luo, Fengfeng; Zhang, Peng; Cao, Xingzhong; Wang, Boyu

doi:10.1016/j.jnucmat.2012.08.043

Cited by 18 publications

(3 citation statements)

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“…Another Chinese reduced activation ferritic/martensitic (RAFM) steel SIMP, with enhanced high-temperature oxidation and liquid metal corrosion resistance, was investigated by DBS and TEM, after sequential H and He (room temperature) implantation, in a very comprehensive work of Jin et al [ 81 ]. Similarly to the study by Xin et al [ 79 ], the increase in the S parameter of the H-implanted sample was found to be higher than in the case of the He-implanted sample, despite the lower displacement damage introduced by hydrogen implantation. The authors interpreted this by the higher trapping rate of helium atoms by vacancies, compared to H atoms.…”

Section: Application Of Pas Techniques In Accelerator-based Irradiation Experimentssupporting

confidence: 79%

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Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

et al. 2021

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Positron annihilation spectroscopy (PAS) is widely recognized as a powerful characterization technique in all types of radiation damage studies in nuclear materials. In the past, fission reactor irradiation of reactor pressure vessel (RPV) steels was a primary aim in most studies, while today’s applications of PAS in this field are centered around ion implantation experiments in advanced structural materials. These experiments use hydrogen, helium, heavy ions, and their combination to simulate various radiation environments of future nuclear reactors or nuclear research facilities. The spectrum of ion energies used ranges from a few tens of keV to tens or even hundreds of MeV in proton irradiation or spallation neutron source irradiation experiments. The variety of ion energies, irradiation temperatures, and other experimental conditions poses a major challenge to researchers, who often fail to successfully incorporate the lessons learned from their research. In this paper, we review and supplement recent PAS studies in which structural materials irradiated under a variety of irradiation conditions were investigated using positron annihilation spectroscopy. It summarizes the most important conclusions and lessons learned from the application of PAS in accelerator-based irradiation experiments.

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Section: Application Of Pas Techniques In Accelerator-based Irradiation Experimentssupporting

confidence: 79%

“…One of the first studies utilizing slow positron beam experiments on sub-sequential H- and He-implanted samples was published on CLAM steel by Xin et al [ 79 ]. In reference to unirradiated material, a positron diffusion length of 120 ± 8 nm was obtained by VEPFIT analysis.…”

Section: Application Of Pas Techniques In Accelerator-based Irradiation Experimentsmentioning

confidence: 99%

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

et al. 2021

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“…Lee et al suggested that the steels received more severe damage under dual ion (He and H) irradiation than under a single ion (He or H) situation [11]. The defect types in CLAM steel after coimplantation with He/H ions were summarized by Xin et al [12]. It has been pointed out Materials 2021, 14, 6669 2 of 9 that both He-and H-vacancy clusters were formed in CLAM steel with pre-implanted He and H, but He-H-vacancy complexes were only formed in the CLAM steel that was pre-implanted with He.…”

Section: Introductionmentioning

confidence: 99%

Effects of He-D Interaction on Irradiation-Induced Swelling in Fe9Cr Alloys

Wang

Zhu

et al. 2021

Materials

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The atomic-scale defects such as (deuterium, helium)-vacancy clusters in nuclear energy materials are one of the causes for the deterioration of the macroscopic properties of materials. Unfortunately, they cannot be observed by transmission electron microscopy (TEM) before they grow to the nanometer scale. Positron annihilation spectroscopy (PAS) has been proven to be sensitive to open-volume defects, and could characterize the evolution of the size and concentration of the vacancy-like nanoclusters. We have investigated the effects of He-D interaction on the formation of nanoscale cavities in Fe9Cr alloys by PAS and TEM. The results show that small-sized bubbles are formed in the specimen irradiated with 5 × 1016 He+/cm2, and the subsequent implanted D-ions contribute to the growth of these helium bubbles. The most likely reason is that helium bubbles previously formed in the sample captured deuterium injected later, causing bubbles to grow. In the lower dose He-irradiated samples, a large number of small dislocations and vacancies are generated and form helium-vacancy clusters with the helium atoms.

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Identifying the influence of the ultrasonic-arc technique on the He+ irradiation damage resistance of CLAM steel TIG welds

et al. 2023

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Vacancy-type defect production in CLAM steel after the co-implantation of He and H ion beams studied by positron-annihilation spectroscopy

Cited by 18 publications

References 32 publications

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

Effects of He-D Interaction on Irradiation-Induced Swelling in Fe9Cr Alloys

Identifying the influence of the ultrasonic-arc technique on the He+ irradiation damage resistance of CLAM steel TIG welds

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