Results 171 to 180 of about 22,235 (219)

Helium-induced swelling in tungsten during postimplantation annealing

Journal of Nuclear Materials, 1994
Abstract A detailed transmission electron microscopy investigation of the gas porosity has been carried out in two types of tungsten specimens: 1. (1) hot-rolled W, homogeneously implanted with 600 appm He at 325 K 2. (2) W single crystals, implanted with up to 2 × 1021 He+ ions/m2 of 40 keV energy at 325 K, followed by annealing at ...
V.N. Chernikov, Ju.V. Lakhotkin, H. Ullmaier, H. Trinkaus, P. Jung, H.J. Bierfeld   +5 more
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Synthesis and resistance to helium swelling of Li2TiO3 ceramics

Journal of Materials Science: Materials in Electronics, 2020
The work is devoted to the study of the effect of helium ion irradiation on the properties of ceramics based on Li2TiO3, which have great potential as a breeding blanket in the design of thermonuclear reactors. The choice of the type of ions and irradiation doses of 1–5 × 1017 ion/cm2 is due to the possibility of modeling the processes of defect ...
D. I. Shlimas, M. V. Zdorovets, A. L. Kozlovskiy   +2 more
openaire   +1 more source

Effects of Helium on Void Swelling in Vanadium

Nuclear Technology, 1976
AbstractVoid formation and swelling were studied in nickel-ion-bombarded vanadium, both with and without the presence of helium. Helium has a significant effect on void nucleation when the defect generation rate is low. At high defect generation rates, helium has little effect on void nucleation and the resultant swelling.
Brimhall, J. L., Simonen, E. P.
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Effect of helium on void swelling in molybdenum

Journal of Nuclear Materials, 1981
Abstract Simultaneous irradiation of molybdenum with helium and heavy ions (Ta 3+ ) using a dual beam facility resulted in continued void nucleation in molybdenum to high dose levels, but the added helium had no measurable effect on the void swelling or swelling rate when compared with results for heavy ion irradiation without helium. Pretreatment by
J.L. Brimhall, L.A. Charlot
openaire   +1 more source

On the helium bubble swelling in nano-oxide dispersion-strengthened steels

Journal of Materials Science & Technology, 2022
Abstract The development of structural materials resistant to harsh radiation environments requires an in-depth understanding of the early stage of the aging processes. In radiation environments with high transmutation helium production rates such as in fusion and spallation applications, even materials with otherwise acceptable radiation stability ...
Vladimir Krsjak, Tielong Shen, Jarmila Degmova, Stanislav Sojak, Erik Korpas, Pavol Noga, Werner Egger, Bingsheng Li, Vladimir Slugen, Frank A. Garner   +9 more
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Helium implantation in Si (100): Swelling, microstructure, and mechanical property changes

Journal of Applied Physics, 2022
Microstructural changes induced by helium implantation in materials lead to volumetric swelling and mechanical property changes. How these properties are linked and establishing direct relationships can be difficult due to the underlying material’s microstructure evolution.
Xi Huang, Yujun Xie, Mehdi Balooch, Sean Lubner, Peter Hosemann   +4 more
openaire   +1 more source

Microstructure change and swelling of helium irradiated beryllium

Fusion Engineering and Design, 2019
Abstract Beryllium, as an outstanding nuclear metal, will be exposed to high-dose irradiation of high-energy neutrons during services in reactor, which will produce a large number of helium and significant irradiation damage resulting in extreme performance degradation.
P.P. Liu, L.W. Xue, L.P. Yu, J.L. Liu, W. Hu, Q. Zhan, F.R. Wan   +6 more
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Influence of Helium on Swelling of Steels

1985
In this work, we have studied the effect of helium and its injection mode on the microstructure of Type 316 and titanium-modified Type 316 stainless steels, both in their solution-annealed and cold-worked states. Irradiations have been conducted in a dual-beam accelerator to doses up to 150 dpa in a wide range of temperatures, from 550 to 750°C ...
V Levy, D Gilbon, C Rivera
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Helium release and lattice swelling in nickel foil irradiated by multiply-energy helium ions

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2019
Abstract Pure nickel foil was irradiated with multiple-energy helium ions at room temperature. Using elastic recoil detection (ERD), the depth profile of helium concentration in nickel foil after the irradiation was investigated. Result showed that very little helium atoms distributed in the regions near two free surfaces, indicating the occurrence ...
Jie Gao, Hefei Huang, Jizhao Liu, Qiantao Lei, Chunjie Wang, Zhibin Han, Guo Yang, Yan Li   +7 more
openaire   +1 more source

Helium content and induced swelling of neutron irradiated beryllium

Fusion Engineering and Design, 1995
The effects of neutron irradiation on beryllium in terms of helium generation and induced swelling have been studied. Beryllium samples were irradiated in the Belgian materials testing reactor BR2 at low temperature (40-50°C) up to 20 000 appm He (for a fission neutron fluence of 5.3×10 22 n cm -2 ).
L. Sannen, Ch. De Raedt, F. Moons, Y. Yao   +3 more
openaire   +1 more source