The vacuum hot pressing of beryllium

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dc.contributor.authorClare, TEen_AU
dc.contributor.authorSmith, PDen_AU
dc.contributor.authorWright, WJen_AU
dc.date.accessioned2007-11-22T04:09:57Zen_AU
dc.date.accessioned2010-04-30T04:31:12Zen_AU
dc.date.available2007-11-22T04:09:57Zen_AU
dc.date.available2010-04-30T04:31:12Zen_AU
dc.date.issued1964-03en_AU
dc.description.abstractThe optimum conditions for vacuum hot pressing of Pechiney electrolytic beryllium powder have been established and compacts produced with densities exceeding 99 per cent, of theoretical density; these conditions depend markedly on the geometry of the compact and the oxide content of the powders being pressed, Effects of compact geometry, including low densities in long compacts, are associated with loss of pressure through die—wall friction, particularly where the length—to—diameter ratio of the compacts is greater than 0.5 . The presence of 2.3 per cent, beryllium oxide as a surface film on the particles reduced the final density attained to less than 97 per cent, of theoretical when pressing with 1500 lb/in2 at 1080ºC whereas this density could be attained in unoxidised powder with only 800 lb/in2 for similar conditions. The narrow size range of the oxidised powder may also have contributed to this difficulty in pressing.en_AU
dc.identifier.citationClare, T. E., Smith, P. D., & Wright, W. J. (1964). The vacuum hot pressing of beryllium. (AAEC-E 118). Lucas Heights, NSW: Research Establishment, Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc267en_AU
dc.identifier.otherAAEC-E-118en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/67en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectBerylliumen_AU
dc.subjectHot pressingen_AU
dc.subjectVacuum systemsen_AU
dc.subjectPowdersen_AU
dc.subjectDensityen_AU
dc.titleThe vacuum hot pressing of berylliumen_AU
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