Conventional Sintering
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Influência da adição de nanopartículas de TiO2 na obtenção de compósitos a base de liga AA2014 fabricada via metalurgia do pó / Influence of the addition of TiO2 nanoparticles in the composites formation based AA2014 alloy manufactured by powder metallurgy
Aluminum matrix composites and its alloys, especially AA2014, are widely used in automotive and aeronautics applications. The properties of this are very influenced by hardening treatment, however its use is limited at temperatures above 150C due to loss of properties caused by the growth of precipitates at this temperature. The addition of a new phase, fine
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2012
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14. Densificação e condutividade elétrica da Zircônia-Escândia-Céria / Densification and electrical conductivity of Zirconia-Scandia-Ceria
Estudos recentes demonstram que o sistema cerâmico zircônia-escândia-céria (ScCeSZ) apresenta-se promissor para aplicações como eletrólito sólido em células a combustível de óxido sólido de temperaturas intermediárias de operação (600 a 800 °C). Neste trabalho, foi realizada a sinterização convencional, de duas etapas e assistida por campo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/05/2012
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15. Efeito do processamento e da inclusão de fibras nas propriedades mecânicas e ópticas de uma porcelana odontológica / The effect of processing methods and fibers incorporation on the optical and mechanical properties of a dental porcelain
The objective was to evaluate the processing methods (conventional sintering and heat pressing) and fibers incorporation on the microstructure, mechanical properties (flexural strength f, and Weibull parameters m, 0 e 5%), slow crack growth parameters (n e f0) and contrast ratio (CR), translucency parameter (TP), opalescence parameter (OP) optical properties
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2011
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16. Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel
In this work, 17-4PH stainless steel parts processed in a Plasma Assisted Debinding and Sintering (PADS) furnace were characterised in terms of microstructure, final density, microhardness, carbon content and tensile behaviour. To determine whether these properties were satisfactory, the same characterisation procedure was conducted on the parts processed by
Materials Research. Publicado em: 08/11/2011
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17. Comparative studies of WC-Co and WC-Co-Ni composites obtained by conventional powder metallurgy
The present work reports a comparative study of cemented carbides of compositions WC-6Co, WC-10Co, WC-20Co, WC-6Co-6Ni and WC-12Ni-6Co. The purpose was to study the powder metallurgical production process of these compositions starting from a commercial WC-6Co powder, obtaining the desired compositions by mass balance with pure Co and pure Ni powders. During
Materials Research. Publicado em: 03/06/2011
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18. Microwave fast sintering of submicrometer alumina
Commercially available alumina powder with high-purity submicrometer particle size and narrow particle size distribution was fully densified by a microwave hybrid fast firing technique. The alumina compacts were surrounded by susceptor material, which helped the heating of the samples, and sintered in a microwave oven at a frequency of 2.45 GHz and a power l
Materials Research. Publicado em: 2010-09
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19. Decision support method to apply Additive Manufacturing Technologies for plastic components in the aircraft industry
Additive Manufacturing Technologies (AMT) are a collection of manufacturing processes driven by CAD data to produce physical models and parts by means of additive techniques. They are based on a layer-by-layer material consolidation process instead of the traditional methods. Due to machine and material developments, such processes may be used to produce fin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/11/2009
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20. Electrophoretic deposition of Ba(Ti0.85Zr0.15)O3 nanoparticles to fabrication of laser sintered ferroelectrics thick films / Deposição de nanopartículas de Ba(Ti0.85Zr0.15)O3 pela técnica de eletroforese para fabricação de filmes espessos ferroelétricos sinterizados a laser
The goals of this work were the implantation and optimization of the technique of sintering by laser scan of thick films, the kinetic study of the process and the evaluation of the physical properties of the laser sintered compound BaTi0.85Zr0.15O3 (BTZ), compared to thick films sintered in conventional furnace. Nanocrystalline powders of BTZ were for the fi
Publicado em: 2008
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21. Comparative study of porosity and pores morphology of unalloyed iron sintered in furnace and plasma reactor
Samples of unalloyed iron were sintered in the presence of an abnormal glow discharge using a confined anode-cathode configuration. The samples were placed on a holder acting as the discharge anode inside an AISI 1020 steel hollow cathode. Heating of the outer cathode was obtained by the bombardment of ions and energetic neutral particles. As a consequence o
Materials Research. Publicado em: 2007-03
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22. Sinterização de aço inoxidável reforçado com partículas nanométricas dispersas de carbeto de nióbio - NbC
Metal powder sintering appears to be promising option to achieve new physical and mechanical properties combining raw material with new processing improvements. It interest over many years and continue to gain wide industrial application. Stainless steel is a widely accepted material because high corrosion resistance. However stainless steels have poor sinte
Publicado em: 2007
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23. Preparation and characterization of ferroelectric materials of Pb1-xLaxTiO3 (PLT) composition in nanometer scale / Preparação e caracterização de materiais ferroelétricos de composição Pb1-xLaxTiO3 em escala nanométrica
The main objective of this work was to obtain ferroelectric materials of Pb1-xLaxTiO3 (PLT) composition, with x = 0.10, 0.15 and 0.20, in nanometer scale in order to prepare nanostructure ceramic and thin films and characterize their structural and electric properties. The nanoparticles used to prepared ceramic samples and the solution used to prepared thin
Publicado em: 2007
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24. Synthesis and dielectric properties of the lase sintered Ba1-xCaxTiO3 (0 ≤ x ≤ 0.30) nanostructured ceramics / Síntese e propriedades dielétricas de cerâmicas nanoestruturadas de Ba1xCaxTiO3 (0 menor igual x menor igual 0.30) sinterizadas a laser
Ba1-xCaxTiO3 (0 ≤ x ≤ 0.30) nanocrystalline powders were successfully synthesized for the first time at relative low temperature (500 °C) by a modified polymeric precursor method. The densification of the ceramics was made by two distinct techniques: conventional sintering using an electric furnace; and by a laser sintering process in which a CO
Publicado em: 2006