The influence of the surface on the production and development of displacement cascades in Ni3Al and Cu3Au
| Autor: | H. Wollenberger, Christian Abromeit, Michael L. Jenkins, S. Müller |
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| Rok vydání: | 2016 |
| Předmět: |
education.field_of_study
Yield (engineering) Materials science Physics and Astronomy (miscellaneous) Ion beam Population Metals and Alloys Condensed Matter Physics Molecular physics Electronic Optical and Magnetic Materials Ion Crystallography Transmission electron microscopy General Materials Science Irradiation Dislocation education FOIL method |
| Popis: | Stereo transmission electron microscopy has been used to characterize the distribution in depth of disordered zones and associated dislocation loops in the ordered alloys Ni3Al and Cu3Au after heavy-ion irradiation, most extensively for Ni3Al irradiated with 50 keV Ta+ ions at a temperature of 573 K. The Cu3Au specimen was irradiated with 50 keV Ni+ ions at a temperature of 373 K with the ion beam incident at 45[ddot] in order to see more clearly the shapes and sizes of the cascades parallel to the beam direction. The defect yield in Ni3Al, that is the probability for a disordered zone to contain a loop, was found to be strongly dependent on the depth of the zone in the foil, varying from about 0.7 for near-surface zones to about 0.2 in the bulk. The sizes and shapes of disordered zones were independent of the depth of the zones in the foil, except for a small population of zones very near the surface which were strongly elongated parallel to the incident ion beam. In Cu3Au the surface had a smal... |
| Databáze: | OpenAIRE |
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