Metallic Particles
Mostrando 13-24 de 86 artigos, teses e dissertações.
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13. Tenacidad a la fractura de compuestos cermets 3Al2O3*2SiO2/Ag manufacturados por molienda de alta energía
The composites known as CERMETS are a combination between ceramics and metallic materials. The properties of these materials are different in comparison to conventional materials and their derivatives. The processing methodology of 3Al2O3*2SiO2 reinforced with silver metallic particles (CERMET) was established and discussed in this research. The final chemic
Matéria (Rio J.). Publicado em: 2016-03
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14. Corrosiveness of Brazilian Candiota Coal
ABSTRACT Candiota city, in the south of Brazil, is located near the largest reserves of mineral coal of the country. This coal is used for thermoelectric power generation. The extraction of coal from open-cut mines involves operations may generate at least some particulate matter into the atmosphere. These particles retained on the surface of metallic struct
Matéria (Rio J.). Publicado em: 2015-12
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15. Combustion synthesis of Co-Cu-Mn oxides deploying different fuels
ABSTRACTTernary spinel-like oxides such as CuFeMnO4, CoCuMnOxand CuCr2O4 are attractive materials due to their absorbent properties when used as pigments for selective surfaces thus improving solar heaters efficiency. These materials are obtained through sol-gel and sol-gel-combustion methods. This work proposes the synthesis of mixed oxides of Co, Cu and Mn
Matéria (Rio J.). Publicado em: 2015-09
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16. Abrasive blasting contamination in Super Duplex and carbon steels - a quantification approach by rietveld analysis
A methodology for quantifying the contamination after abrasive blasting by Aluminum Oxide and Martensitic Carbon Steel particles in Super Duplex and Carbon Steel substrates has been developed. The method consisted of performing x-ray diffraction in the blasted steel substrates and calculating the particle contamination using Rietveld Quantitative Method. In
Mat. Res.. Publicado em: 2014-10
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17. Resonant properties, of modified triangular plasmonic nanoparticles with higher field concentration
In this paper, we present an analysis of the resonant response of modified triangular metallic nanoparticles with polynomial sides. The particles are illuminated by an incident plane wave and the method of moments is used to solve numerically the electromagnetic scattering problem. We investigate spectral response and near field distribution in function of t
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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18. Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene
Textural and catalytic properties of nickel, palladium or titanium oxides supported on MCM-41 materials were evaluated in this paper. The results indicated that the MCM-41 material with well defined and highly ordered hexagonal structure was obtained. After metal ions impregnation and calcinations, the structure of MCM-41 was preserved and formed metallic ox
Mat. Res.. Publicado em: 27/09/2013
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19. Facile preparation of Mn-doped CeO2 Submicrorods by composite-hydroxide-salt-mediated approach and their magnetic property
Mn-CeO2 submicrorods have been obtained from anomalous CeO2 particles though a novel composite-hydroxide-salt-mediated (CHSM) approach. This method is based on a reaction between a metallic salt and a metallic oxide in a solution of composite-hydroxide-salt eutectic at ~225 ºC and normal atmosphere without using an organic dispersant or capping agent. The m
Mat. Res.. Publicado em: 22/03/2013
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20. Catalisadores de Pd metálico modificados por líquidos iônicos para a hidrogenação seletiva de compostos poli-insaturados
In this work, heterogeneous catalysts immobilized on supported ionic liquid (IL) were prepared, characterized and investigated in hydrogenation reactions of the substrates 1,5-cyclooctadiene (1,5-COD), trans-cinnamaldehyde (CALD) and nitrobenzene (NB). Two methods were used to prepare the catalysts. In the first, commercial Pd/C catalyst was coated with diff
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2012
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21. Preliminary viability studies of fibroblastic cells cultured on microcrystalline and nanocrystalline diamonds produced by chemical vapour deposition method
Implant materials used in orthopedics surgery have demonstrated some disadvantages, such as metallic corrosion processes, generation of wear particles, inflammation reactions and bone reabsorption in the implant region. The diamond produced through hot-filament chemical vapour deposition method is a new potential biomedical material due to its chemical inert
Mat. Res.. Publicado em: 13/11/2012
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22. Síntese de manganita dopada com estrôncio e cobaltita dopada com antimônio e caracterização microestrutural
The great variety of properties of oxides with the perovskite structure allows their application in several fields of technology. Specially, the electrochemical properties and the thermal stability of some of these compounds make these materials the most used in devices for energy generation such as the solid oxide fuel cells (SOFC). SOFC¿s are devices the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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23. Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida / Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida
The A356.0 alloy is widely used in aerospace and automotive industry and other structural applications which require high mechanical strength. The control of solidification cooling rate and heat treatments are necessary to obtain more appropriate microstructures resulting in improvement of their properties. In this paper was evaluated the influence of coolin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011
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24. Produção de recobrimentos metálicos a partir de ligas de ferro amorfizáveis / Production of metallic coatings based on amorphous iron alloys
The aim of this work was to study the production of metal coatings from amorphous alloy Fe-25Cr-7Ni-4,5B (wt.%), with special focus on mechanical and microstructure properties. Initially, preliminary studies were made through the production of ribbons and bulks of metallic alloys Fe-25Cr-7Ni-XB (X = 3.5, 4.5, 5.5 wt.%) for the evaluation of amorphous phase f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/10/2011