Electron microscope studies of irradiated beryllium metal.

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dc.contributor.authorChute, JHen_AU
dc.date.accessioned2007-11-22T04:19:25Zen_AU
dc.date.accessioned2010-04-30T04:33:40Zen_AU
dc.date.available2007-11-22T04:19:25Zen_AU
dc.date.available2010-04-30T04:33:40Zen_AU
dc.date.issued1963-05en_AU
dc.description.abstractWhen beryllium is irradiated by fast neutrons, helium is produced by the (n,2n) and (n,α) transmutation reactions. Electron microscopy techniques have been used to study the nucleation and distribution of helium bubbles in several different grades of beryllium, after irradiation at temperatures in the range 75 — 700ºC. The effect of post-irradiation annealing is also reported. It is shown that for similar neutron doses and irradiation temperatures, there were wide variations in helium bubble size and distribution in specimens of beryllium fabricated by different methods. The most satisfactory material was that fabricated from Pechiney powder by direct hot extrusion followed by annealing for one hour at 800ºC and air cooling, it is suggested that the helium bubbles nucleate on second phase precipitates and that the distribution of this phase is strongly affected by fabrication and heat treatment.en_AU
dc.identifier.citationChute, J. H. (1963). Electron microscope studies of irradiated beryllium metal. (AAEC/E108). Lucas Heights, NSW: Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc408en_AU
dc.identifier.otherAAEC-E-108en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/329en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectElectron microscopesen_AU
dc.subjectBerylliumen_AU
dc.subjectFast neutronsen_AU
dc.subjectMetalsen_AU
dc.subjectHeliumen_AU
dc.titleElectron microscope studies of irradiated beryllium metal.en_AU
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