FRANK FERRER SENE
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Artigo IPEN-doc 24722 Obtention of WCuNi composite material using powder metallurgy for gamma (γ) radiation attenuation2017 - CIONE, F.C.; SOUZA, A.C.; SENE, F.F.; GOMES, M.P.; SOARES, E.P.; ROSSI, J.L.This work aimed to obtain a composite material WCuNi using the powder metallurgy. This composite is usable as material for the attenuation of gamma radiation (γ). The tungsten (W) is the main shielding element in this composite. The tungsten has high density (19.25 g.cm-3), high melting point (3,422 °C) and is presented as matrix of the composite. In order to meet the need for sintering with temperatures below 1,200 °C, the liquid phase sintering technique was used. For preparation of the samples, shape and size of the particles of the metal powders were analyzed. With the intention of homogenize the distribution of the metallic powders and to reduce the average particle size, a ball mill was used for 24 hours. After grinding, the particle size analysis showed that the mean particle size in WCuNi composition was 12 μm. The powder mixture was compacted in isostatic press at 200 MPa pressure. The samples were sintered at 1,100 °C and at 2,100 mbar pressure of reducing atmosphere (H2) for 8 hours. The formation of the isomorphic system CuNi is responsible for giving the mechanical characteristic of solid to the composite WCuNi. Optical and electronic microscopy (SEM) with EDS were undertaken to characterize the samples. The classical scientific method of experimentations with gamma radiation of the cobalt-60 source by attenuation of the energies was employed to study the effects on the samples. For the energies of 1,173 MeV and 1,332MeV the experimental method indicated the necessity of 11.95 mm of thickness for the solid compound W8Cu1Ni with the obtained density of 11.46 g.cm-3 to attenuate the energy to level allowed for occupationally exposed persons. The experimental values obtained were compared with values calculated by XCOM software database (NIST) of 12.45 mm and convergence of values was observed.Artigo IPEN-doc 23886 Synthesis and characterization of Ni-Mo sintered alloy foils for microwave tube manufacturing2013 - SENE, FRANK F.; SANTOS, VINICIUS O.; MOTTA, CLAUDIO C.The Ni-Mo composite alloy, to be used in microwave vacuum tube manufacturing, was prepared from metal powders previously homogenized, pressed and sintered at 1200oC by induction heating. The Ni-Mo sintered discs were annealed at 1150oC for 20min, and submitted to the roller process in 5 cycles to obtain a thin foil with 0.10 mm of thickness, for brazing process adopted to join the cathode components. The samples were submitted to scanning electron microscopy (SEM) coupled to energy dispersive spectroscopy analysis (EDS) to characterize the composition and microstructure. X-ray diffraction (XRD) was performed to determine the crystalline structure and energy dispersive X-ray fluorescence spectroscopy (EDX) was performed to determine the chemical composition and the homogeneity of the composite alloy.Artigo IPEN-doc 23717 A Study of Production of Tungsten Copper Alloy by Powder Metallurgy, Applied to Radioactive Shielding of Transport Equipment for Pharmaceutical Products2015 - CIONE, FRANCISCO C.; SOUZA, ARMANDO C. de; SENE, FRANK F.; RIZZUTTO, MARCIA de A.; ROSSI, JESUALDO L.Safety is of paramount importance for the storage and transportation of radiopharmaceutical products, being directly dependent on the radiation shielding material used in specific devices. The focus of present work, part of a larger project, is to minimize the use of harmful materials, as lead and depleted uranium, in such devices construction. The radioactive energy reduction varies according to density of material used as shielding. Because Tungsten has a high density and, implicitly, good shielding properties without to be harmful, but has poor workability, researches were focused on Tungsten - copper heavy alloys. The objective of the performed research was the optimization of alloy composition in order to achieve the best linear absorption coefficient. The studied compositions were 15, 20 and 25 wt.% copper. The linear absorption coefficient was similar either for the green and sintered compacts, thus the porosity level did not have measurable effect on the radiation attenuation.Artigo IPEN-doc 21034 The shielding against radiation produced by powder metallurgy with tungsten copper alloy applied on transport equipment for radio-pharmaceutical products2015 - CIONE, FRANCISCO C.; RIZZUTTO, MARCIA A.; SENE, FRANK F.; SOUZA, ARMANDO C. de; BETINI, EVANDRO G.; ROSSI, JESUALDO L.Artigo IPEN-doc 12060 Synthesis and characterization of phosphate glass microspheres for radiotherapy applications2007 - SENE, FRANK F.; MARTINELLI, JOSE R.; OKUNO, EMICOArtigo IPEN-doc 10502 Optical and structural characterization of rare doped niobium phosphate glasses2003 - SENE, F.F.; MARTINELLI, J.R.; GOMES, L.Artigo IPEN-doc 18375 Desenvolvimento de microesferas de vidros fosfato contendo hólmio para aplicação em radioterapia interna seletiva2012 - BARROS, E.C.; SENE, F.F.; MARTINELLI, J.R.Artigo IPEN-doc 19265 Development and evaluation of holmium doped phosphate glass microspheres for selective internal radiotherapy2013 - BARROS FILHO, ERALDO C.; MARTINELLI, JOSE R.; SENE, FRANK F.; SQUAIR, PETERSON L.; OSSO JUNIOR, JOAO A.Artigo IPEN-doc 19858 Emprego da biomodelagem em fibras de sisal na obtrenção de Alsub(2)Osub(3) via infiltração de nitrato de alumínio2013 - MANCINI, V.A.; MARTINELLI, J.R.; SENE, F.F.Artigo IPEN-doc 15126 Production of microspheres labeled with holmium-166 for liver cancer therapy:the preliminary experience at IPEN-CNEN/SP2009 - COSTA, RENATA F.; AZEVEDO, MARIANGELA B.M.; NASCIMENTO, NANCI; SENE, FRANK F.; MARTINELLI, JOSE R.; OSSO JUNIOR, JOAO A.