Investigation of the behaviour of helium and radiation defects after room temperature he-implantation of nickel and copper
- 1 January 1983
- journal article
- Published by Taylor & Francis in Radiation Effects
- Vol. 78 (1) , 213-219
- https://doi.org/10.1080/00337578308207372
Abstract
Helium was implanted in a homogeneous distribution into thin foils of nickel and copper at room temperature. The development of the irradiation defects and the helium precipitates was investigated by the combined measurements of the change in length and the change in lattice parameter (differential dilatometry). The results show: (a) over the range of He-concentration between 1000 to 10,000 appm of He, the number of vacancies observed in the metals is larger than the number of self-interstitial atoms. Therefore, the majority of the interstitial atoms is not present in small separate dislocation loops but rather in a dislocation network. (b) The number of vacancies cv is larger than the number of the implanted He atoms. This result indicates that highly overpressurized He-bubbles are not the dominant helium-vacancy agglomerates and consequently the growth of the small precipitates is not controlled by a loop punching mechanism or by SIA-emission.Keywords
This publication has 19 references indexed in Scilit:
- He bubbles in Ni: A small-angle X-ray scattering studyJournal of Nuclear Materials, 1982
- Density and pressure of helium in small bubbles in metalsJournal of Nuclear Materials, 1982
- Surface swelling produced in Nb and Ti-6A1-4V by He irradiationJournal of Nuclear Materials, 1981
- Room temperature precipitation of helium in molybdenum observed by tem and THDS; Helium platelet formationJournal of Nuclear Materials, 1981
- Microstructure of Ni and stainless steel after multiple energy He and D implantationJournal of Nuclear Materials, 1980
- Optical measurements of the density of helium in small bubbles in aluminium filmsJournal of Nuclear Materials, 1980
- Site occupancy and annealing behavior of helium in high purity copperJournal of Nuclear Materials, 1976
- Site occupancy and bubble formation op helium in high purity aluminumJournal of Nuclear Materials, 1970
- The effect of concentration upon helium precipitation in irradiated copper boron alloysJournal of Nuclear Materials, 1967
- A preliminary investigation of helium gas precipitation in irradiated copper-boron alloysJournal of Nuclear Materials, 1965