Results 181 to 190 of about 5,476 (206)

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

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
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

The influence of thermal vacancies on helium-induced volume swelling in silicon carbide

Journal of Nuclear Materials, 1990
On etudie la formation de vides et de bulles dans SiC irradie par des neutrons, le gonflement de SiC contenant du bore lors du recuit apres irradiation ainsi que les microstructures a l'aide de la MET, afin d'evaluer l'emploi possible de SiC dans les reacteurs de fusion ...
T. Suzuki, T. Iseki, T. Mori, J.H. Evans
openaire   +1 more source