In-situ studies of cascade defect formation at T < 10/sup 0/K
Thin films of Ag and Au were ion-irradiated at temperature (T) < 10/sup 0/K and simultaneously observed using the Argonne National Laboratory high-voltage electron microscope (HVEM) ion-beam interface system. Displacement cascades were produced by Kr/sup +/ ion bombardment in the energy range 20 to 140 keV. For Ag, 20% of the 20-keV cascades and 100% of the 100-keV cascades produced observable contrast. Analysis of the observed dynamical black-white (BW)-contrast indicates that the clusters are of vacancy type. Subcascades were observed in the high-energy irradiations. The present results demonstrate that, during the evolution of displacement cascades in Ag and Au, extensive athermal rearrangement of vacancies occurs which gives rise to clustering and collapse to dislocation loops.
- Research Organization:
- Northwestern Univ., Evanston, IL (USA). Dept. of Materials Science and Engineering; Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6055376
- Report Number(s):
- CONF-830819-1; ON: DE83014309
- Resource Relation:
- Conference: 7. international conference on high voltage microscopy, Berkeley, CA, USA, 16 Aug 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GOLD
PHYSICAL RADIATION EFFECTS
SILVER
CRYSTAL DEFECTS
DISLOCATIONS
ELECTRON MICROSCOPY
ION BEAMS
KEV RANGE
KRYPTON IONS
MICROSTRUCTURE
THIN FILMS
VACANCIES
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
ELEMENTS
ENERGY RANGE
FILMS
IONS
LINE DEFECTS
METALS
MICROSCOPY
POINT DEFECTS
RADIATION EFFECTS
TRANSITION ELEMENTS
360106* - Metals & Alloys- Radiation Effects