The Crucible
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Synthesis, Characterization and Photocatalytic Performance of SnS Nanofibers and SnSe Nanofibers Derived from the Electrospinning-made SnO2 Nanofibers
SnO2 nanofibers were fabricated by calcination of the electrospun PVP/SnCl4 composite nanofibers. For the first time, SnS nanofibers and SnSe nanofibers were successfully synthesized by double-crucible sulfurization and selenidation methods via inheriting the morphology of SnO2 nanofibers used as precursors, respectively. X-ray diffraction (XRD) analysis sho
Mat. Res.. Publicado em: 16/10/2017
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2. Microstructural characterization of as-cast hf-b alloys
An accurate knowledge of several metal-boron phase diagrams is important to evaluation of higher order systems such as metal-silicon-boron ternaries. The refinement and reassessment of phase diagram data is a continuous work, thus the reevaluation of metal-boron systems provides the possibility to confirm previous data from an investigation using higher puri
Materials Research. Publicado em: 14/02/2012
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3. História e ficção na construção do conflito trágico Em as bruxas de salém, de Arthur Miller
A presente pesquisa tem por objetivo investigar as relações entre história e ficção na construção da peça The Crucible (As Bruxas de Salém, 1953), de Arthur Miller. Após situar o leitor no teatro moderno norte-americano e na vida do autor, buscando assim enquadrar os estudos do texto no contexto da época de Miller, visando uma interpretação que
Publicado em: 2011
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4. Estudos de simulação computacional do processo de redução de UF4 a Urânio metálico / computational simulation studies of the reduction process of UF4 to metallic uranium
The production of metallic uranium is essential for production of fuel elements for using in nuclear reactors manufacturing of radioisotopes and radiopharmaceuticals. In IPEN, metallic uranium is produced by magnesiothermical reduction of UF4. This reaction is performed in a closed graphite crucible inserted in a sealed metal reactor and no contact with the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2010
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5. Processing and characterization of Ti-Cu-Ni-Zr and Ti-Fe-Co-Zr glass former alloys / Processamento e caracterização de ligas amorfizáveis TiCuNiZr e TiFeCoZr
Searching the development of bulk metallic glasses the research takes two directions, the development of alloys with a high glass forming ability and development of new processes or improving existing processes. In this context, the present study aimed at to evaluate the solidification processes suction and centrifugal casting, both using copper moulds. The
Publicado em: 2010
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6. Effect of inoculation on the grain macrostructure of Al-Si alloys obtained by unidirectional solidification. / Efeito da inoculação na macroestrutura de grãos de ligas AI-Si obtidas por solidificação unidirecional.
The development of various industrial sectors, such as the automotive and the aerospace industry, demand premium aluminum castings with strict control of mechanical properties. To fulfill these requirements, the control of solidification processes and the knowledge of relations between the processing variables and the casting properties are necessary. The me
Publicado em: 2009
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7. Aspectos discursivos em As Bruxas de Salem: peça e filme
This paper whose title is Os Aspectos Discursivos em As Bruxas de Salem: peça e filme tries to discuss the effects in meaning provoked by the transposition made involving the rubric of the written play named The Crucible (1953), and the movie (1976), also named the same. This way, two related excerpts were taken from each work as an attempt to analyse them
Publicado em: 2009
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8. Estudo da dissolução de vidros niobofosfato em água e em solução simuladora de fluído fisiológico / Evaluation of the dissolution rate of niobium phosphate glasses in water and simulated body fluid solution
The need to extend and improve the quality of life is leading to the search of new materials. Glasses containing phosphorous in their compositions are considered biomaterials and can be used as scaffolds because they have a structure close to the mineral component of bone tissues, and present relatively high solubility in water. The chemical composition, mor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2008
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9. Estudo da formação de interface de boreto para a deposição de diamante cvd sobre carboneto de tungstênio / Study of the formation of interface of boreto for deposition of diamond cvd on carbide of tungsten
This work developed a preparation method of an interface for adherent CVD diamond deposition on tungsten carbide sintered with cobalt (WC-Co). This method consists on reactive boron thermodiusion on WC-Co surface. This boronizing process uses a powder mixture of B_4C, KBF_4 , C e SiC, it is performed in a stainless steel crucible, at 1000°C for 5h. The bori
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2008
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10. Crescimento de fibras de LiYF4 dopadas com Nd3+ e Er3+ para aplicações em lasers de estado sólido / SINGLE FIBER CRYSTAL GROWTH OF Nd3+ AND Er3+- DOPED LiYF4 FOR SOLID STATE LASER APPLICATIONS
In the present work, we studied the growth of single crystal fibers of LiYF4 (YLF) doped with Er3+ or Nd3+ by the resistive micro-pulling-down (-PD) tecnhique. A new method for crucible preparation was developed to improve the growth process. The use of better-built crucibles allows their use in more than one experiment, increasing the process reproducibilit
Publicado em: 2008
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11. "Metodologia para Determinação de Hidrocarbonetos Policíclicos Aromáticos em Sedimentos e Solos Periféricos à Represa São Pedro Juiz de Fora, MG"
Polycyclic Aromatic Hydrocarbons are important substances that are produced by many antropogenic sources, among that, the most significant is burns of fossil fuels and biomass which releases these compounds to the environment. Sediments and soils are important matrix to study contamination and their effects because they are able to adsorb organic compounds s
Publicado em: 2008
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12. REFRACTORIES FOR MOLTEN ALUMINUM TRANSPORTATION: FUNDAMENTS, SIMULATION AND INDUSTRIAL RESULTS / Refratários para o transporte de alumínio líquido: fundamentos, simulação e prática industrial
Not only for the development of their products, the aluminum industry has engaged its efforts in services for their customers. One of them is the molten aluminum delivery (7 to 8 t) in crucibles for long distances (over 100 to 200 km). This is an advantageous practice for the customers because it allows saving energy in the melting process, and the suppliers
Publicado em: 2007