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Avaliacao dosimetrica da solucao fricke gel usando a tecnica de espectrofotometria para aplicacao na dosimetria de eletrons e neutrons / Dosimetric evaluation of the fricke gel dosimeter using the spectrophotometric technique for application in electron and neutron dosimetryMANGUEIRA, THYAGO F. 09 October 2014 (has links)
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Estudo da influencia do campo magnetico na resistencia a corrosao em imas permanentes de Nd=Fe-BOLIVEIRA, MARA C.L. de 09 October 2014 (has links)
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Caracterização magnética e microestrutural de ímãs sinterizados de Pr-Fe-B processados pela técnica de transferência de pós e utilizando decrepitação por hidrogênioSOARES, EDSON P. 09 October 2014 (has links)
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Estudo microestrutural e propriedades magnéticas em imãs permanentes sinterizados à base de PrFeCoBNb com adições de elementos de liga / Microstructural study and magnetic properties of PrPeCoBNb-based permanent sintered magnets with alloy additionsMENDES NETO, TEOFILO 09 October 2014 (has links)
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Efeito da adição de óxido de zinco e de óxido de boro nas propriedades de zirconato de bário dopados com ítrio / Effect of zinc oxide and boron oxide addition on the properties of yttrium-doped barium zirconateANDRADE, TIAGO F. 09 October 2014 (has links)
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Componentes derivados de venenos de serpentes com ação antitumoral em células de melanoma murino / Snake venoms components with antitumor activity in murine melanoma cellsQUEIROZ, RODRIGO G. 09 October 2014 (has links)
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Caracterização do campo de nêutrons na instalação para estudo e, BNCT no reator IEA-R1 / Neutron field characterization in the installation for BNCT study in the IEA-R1 reactorCARNEIRO JUNIOR, VALDECI 09 October 2014 (has links)
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Estudo eletroquimico da co-reducao de KBFsub4 e Ksub2 TIFsub6 em meio de uma mistura eutetica de LiF-NaF-KF para a obtencao do diboreto de titanio [TIB sub 2]ETT, GERHARD 09 October 2014 (has links)
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Avaliacao do efeito de tratamentos superficiais na resistencia a corrosao de magnetos de Nd-Fe-B / Assessment of the effect of surface treatments on the corrosion resistance of Nd-Fe-B MagnetsMARTINS, EMERSON A. 09 October 2014 (has links)
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Obtenção e evolução da fase icosaedral quasicristalina em ligas Al-Cu-Fe e Al-Cu-Fe-B por Melt-Spinnin / OBTAINING AND EVOLUTION OF PHASE ICOSAHEDRAL QUASICRISTALINA IN ALLOYS Al-Cu-Fe AND Al-Cu-Fe-B BY MELT-SPINNINGFeitosa, Francisco Riccelly P. 03 March 2009 (has links)
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Previous issue date: 2009-03-03 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Melt spinnng processing is one of the most common processes to obtaining quasicrystaline structures. This is because of the fast cooling rate it imposes on the system, favoring such type of structure. This work deals with the production of quasycristaline phases (Al60Cu27,5Fe12,5 e Al57Cu27,5Fe12,5B3) via melt-spinning. The alloys were initially cast via induction melting under atmospheric air, with the designed chemical composition of the quasicrystals. Hence, the ribbons were produce by melt-spinning were characterized by means of x-ray diffraction and scanning electron microscopy. The results indicate that the icosahedral ψ - Al65Cu20Fe15 phase formed in both types of starting compositions. It seams that the boron contributes to stabilize the icosahedral phase. / O processo melt-spinning por imprimir altas taxas de resfriamento, é um dos principais meios para a obtenção de ligas com estrutura quasicristalinas, sendo o primeiro método utilizado para produzir materiais quasicristalinos. Neste trabalho utilizou-se este processo para a elaboração das ligas quasicristalinas Al(60-x)Cu25Fe15Bx, Al(60-x)Cu27,5Fe12,5Bx e Al(65-x)Cu20Fe15Bx (x=0 e x=3%at de boro). As ligas foram previamente fabricadas, por fusão, em atmosfera de argônio, em forno à indução, para em seguida serem submetidas ao processo melt-spinning , onde se obteve o material na forma de fita. As amostras foram caracterizadas por difração de raios-x e microscopia eletrônica de varredura. Os resultados indicaram a formação da fase icosaedral ψ - Al65Cu20Fe15 nas composições estudadas e uma provável contribuição do boro na produção dessa fase icosaedral
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