Sintered Nickel Casing for Irradiation Targets
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Materials Science Forum
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The aim of this work was to develop an alternative way to obtain casings used with
irradiation targets containing uranium, for the production of the radionuclide Mo-99-Tc99m. The
targets used for the production of Mo-99 are materials containing U-235 designed to be irradiated in
a nuclear reactor. Usually these targets are encapsulated in aluminum or stainless steel. The idea
here is to obtain casings by encapsulating a uranium button or a metallic cylinder with compacted
and sintered nickel powder, this serving as a sealing for the fissile products occurring during U-235
irradiation. The sintered high purity nickel powder samples were compacted in uniaxial hydraulic
press at 195 MPa. The sintering of the samples was carried out in an open-air furnace in an
atmosphere with a certain control using titanium-machining chips at 600 ˚C. The samples bulk
density was evaluated by the Archimedes' principle. The porosity of 20.08% was measured by
mercury porosimetry. The microstructure was investigated by scanning microscopy revealing
interconnected porosity and nickel oxide at the particles boundary surface. The results obtained by
sintering of nickel powder according to the experimental undertaken, indicate the feasibility of
achieving a casing for uranium targets.
Como referenciar
MIYANO, R.S.L.; TAKIISHI, H.; SOARES, E.P.; SALIBA-SILVA, A.M.; ROSSI, J.L. Sintered Nickel Casing for Irradiation Targets. Materials Science Forum, v. 869, p. 484-489, 2016. DOI: 10.4028/www.scientific.net/MSF.869.484. Disponível em: http://repositorio.ipen.br/handle/123456789/28440. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.