Results 181 to 190 of about 22,235 (219)

Swelling and stacking fault formation in helium implanted SiC

Journal of Nuclear Materials, 2011
Abstract Effects of annealing on surface swelling in helium implanted 4H–SiC were studied for different implant conditions. The significant increase of surface swelling observed upon high temperature annealing of samples implanted under severe implant conditions (high temperature and fluence) is observed to be concomitant with the growth of cavities ...
J.F. Barbot, M.F. Beaufort, M. Texier, C. Tromas   +3 more
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Swelling of metallic surfaces irradiated by helium ions

Radiation Effects, 1983
Abstract At doses close to threshold for exfoliation or bubble formation the surfaces have been investigated by SEM and, after isolation of surface layers, also by RBS. Swelling as a function of energy and material has been determined. The data are interpreted in the form of volume occupied by a helium atom.
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Advances in void swelling and helium bubble physics

Journal of Nuclear Materials, 1984
Abstract The extensive experimental data base on irradiated austenitic alloys reveals that swelling as a function of dose can be divided into an initial transient period of low swelling rate, followed eventually by a rate of about 1%/dpa. Whereas the transient depends strongly on microstructure, temperature, and composition, the final rate of ...
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Correlation of swelling with local gas concentration in helium irradiated niobium

Nuclear Instruments and Methods, 1980
Abstract Further analysis of the swelling of Nb under He irradiation at 5–25 keV reveals that the swelling is directly proportional to total fluence retained, i.e. 2 × 10 −23 cm 3 /He atom, irrespective of the energy (and hence of the width and shape of the He distribution).
R.G. Saint-Jacques, G. Veilleux, B. Terreault   +2 more
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Effect of helium production on swelling of F82H irradiated in HFIR

Journal of Nuclear Materials, 2000
Abstract The effects of helium production and heat treatment on the swelling of F82H steel irradiated in the HFIR to 51 dpa have been investigated using 10B, 58Ni and 60Ni-doped specimens. The swelling of tempered F82H-std and F82H doped with 10B irradiated at 400°C ranged from 0.52% to 1.2%, while the swelling of the non-tempered F82H doped with ...
E Wakai, N Hashimoto, Y Miwa, J.P Robertson, R.L Klueh, K Shiba, S Jistukawa   +6 more
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Effect of helium on the swelling of GlidCop Al25 IG alloy

Journal of Nuclear Materials, 2002
Abstract This report presents data on the effect of neutron irradiation up to 0.5 dpa in the mixed spectrum SM-2 reactor at Tirr≈160 and ≈295 °C and on the TEM microstructure of GlidCop Al25 IG oxide dispersion strengthened copper after different heat treatments (CR+annealed, HIP).
S.A Fabritsiev, A.S Pokrovsky, S.J Zinkle, S.E Ostrovsky   +3 more
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Effects of helium on void swelling in boron doped V–5Fe alloys

Journal of Nuclear Materials, 1998
Abstract The effects of helium on void swelling in V–5Fe were investigated with natural boron-doping techniques during FFTF/MOTA (Fast Flux Test Facility/Materials Open Test Assembly) irradiation. Microstructural observation was carried out to understand the swelling behavior obtained from density measurements.
Takeo Iwai, Naoto Sekimura, F.A. Garner
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To a question of temperature driven gas swelling in helium doped ferritic alloys

Journal of Nuclear Materials, 2020
Abstract Samples of three different ferritic steels: conventional AISI410S and two experimental oxide dispersion-strengthened alloys Сr16ODS and EP450ODS, were uniformly ion-doped with helium to concentrations of 0.2 and 1 at% and annealed in vacuum at 1023K.
A.S. Sohatsky, T.V. Nguyen, V.A. Skuratov, I.A. Bobrikov, J.H. O’Connell, J. Neethling, M. Zdorovets   +6 more
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Effect of helium on dislocation loop formation and radiation swelling in SiC

Journal of Nuclear Materials, 2004
Abstract SiC and SiC/SiC composites are considered as candidate materials for fusion reactors. In a fusion reactor environment, helium atoms will be produced in SiC up to very high concentrations (15 000–20 000 at. ppm) and therefore it is very important to understand how helium effects radiation swelling of SiC.
A.I Ryazanov, A.V Klaptsov, A Kohyama, Y Katoh, H Kishimoto   +4 more
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Gas-induced swelling in helium-implanted copper during annealing

Journal of Nuclear Materials, 1992
A detailed transmission electron microscopy (TEM) investigation of the gas porosity (GP) in pure copper homogeneously implanted with helium at 323 K to a concentration of cHe ⋍ 300 appm as a result of postimplantation annealing for up to 0.5 h at temperatures between 838 and 1193 K has been carried out.
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