Powder Sintered Metal
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Análisis de la corrosión de uniones por soldadura fuerte de compósitos matriz cobre
ABSTRACT This work presents an electrochemical corrosion study in synthetic seawater of the dissimilar joint of TiC/Cu composite by brazing technique. Composites were machined by liquid infiltration without external pressure. This composite were joined with copper using a filler material constituted by an alloy of silver - copper and titanium powder. The com
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Spark Plasma Sintering of a Hard Metal Powder Obtained from Hard Metal Scrap
Spark plasma sintering is used to consolidate a WC-Co powder produced from milled discharged hard metal cutting inserts. The powder was mixed to 10%wt Co powder and spark plasma sintered (SPS) under 80Mpa pressure, at 1200ºC with heating rate of 160ºC/min. A reference alloy was prepared with a commercial WC powder and 10%wt. Co under the same conditions. T
Mat. Res.. Publicado em: 13/03/2017
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3. Adjusting the Sintering Cycle of a Hadfield Sintered Steel Produced by Metal Injection Molding
Processing of high manganese austenitic sintered steels present several challenges concerning thermodynamic reactions that occur during the sintering of these materials such as Mn oxidation, sublimation and even the formation of liquid phases or undesired compounds, e.g. grain boundary carbides. Therefore it is extremely important to adjust the sintering par
Mat. Res.. Publicado em: 17/11/2015
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4. The effect of voltage on the arc stud welding of microwave sintered Fe+Al powder mixture
The joining of powder metallurgy products is of importance because of high demand in many industrial applications. In this study, the effect of welding voltage on the joint quality has been investigated using discharge arc stud welding, a low heat input welding method, without gas protection to join steel stubs to microwave sintered compacts containing a pow
Mat. Res.. Publicado em: 03/06/2014
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5. Caracterização das camadas formadas pela nitretação a plasma de ferro sinterizado / CHARACTERIZATION OF LAYERS FORMED BY PLASMA NITRIDING AT SINTERED IRON
A nitretação iônica é um processo de tratamento termo-físico-químico que consiste em um endurecimento superficial, provocado pela difusão intersticial de nitrogênio atômico na superfície de ligas ferrosas e não ferrosas. O entendimento e o controle da formação da camada nitretada apresentam considerável interesse industrial devido às melhorias
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/03/2012
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6. Caracterização estrutural, morfológica e magnética da dupla perovsquita Ca2MnReO6
Compounds with structure of ordered double perovskyte, A2BBO6 (A being an alkalineearth and B being a transition-metal in alternate sites) have attracted interest of the researches because their strong correlated structural and magnetic properties. Moreover, they are suitable candidates to produce devices with great application in spin-electronic, named spin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2009
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7. SYNTHESIS AND CERAMIC PROCESSING OF ALUMINA AND ZIRCONIA BASED COMPOSITES INFILTRATED WITH GLASS PHASE FOR DENTAL APPLICATIONS / Síntese e processamento de compósitos á base de alumina e zircônia com infiltração de fase vítrea para aplicações odontológicas
The interest for the use of ceramic materials for dental applications started due to the good aesthetic appearance promoted by the similarity to natural teeth. However, the fragility of traditional ceramics was a limitation for their use in stress conditions. The development of alumina and zirconia based materials, that associate aesthetic results, biocompat
Publicado em: 2009
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8. Synthesis and sintering of ZrO2 - 4,5%Y2O3 nanoparticles / Obtenção e sinterização de nanopartículas de ZrO2-4,5%Y2O3
The powders synthesis of yttria-stabilized zirconia by chemical methods has enabled the reduction in particle size for the submicrometer-sized scale. This reduction is to improve the electrical and mechanical responses of electrolyte fuel cells. Contributing in this research, this work was to study the effects of temperature elimination of organic phases, to
Publicado em: 2009
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9. Compósitos cerâmicos porosos de alumina - zircônia para aplicação em sistemas de controle térmico para satélites: obtenção e caracterização / Alumina-zirconia porous ceramic composites for application in satellite thermal control systems: obtaining and characterization
To control the temperature of satellites are used various thermal control heat systems. The Loop Heat pipe (LHP) are being developed at the DEM (Space Mechanic and Control Division) of the INPE (National Institute for Space Research) an apparatus for passive heat control of the satellites components. The main components of the LHP system are: capillary evapo
Publicado em: 2008
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10. Comparison of two different synthesis methods of perovskites, SrCo0.5FeO3 type, aiming at evaluating their use as membranes for partial oxidation of methane
In this work two different synthesis methods of perovskites, SrCo0.5FeO3, were compared: combustion synthesis and oxides mixture aiming at evaluating their use as membranes for partial oxidation of methane. The combustion synthesis method explores an exothermic, generally very fast and self-sustaining chemical reaction between the desired metal salts and a s
Materials Research. Publicado em: 2004-06