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Mostrando 25-36 de 378 artigos, teses e dissertações.
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25. Mechanical properties and morphological characteristics of ARALL reinforced with TRGO doped epoxy resin
ABSTRACT Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mech
Matéria (Rio J.). Publicado em: 06/12/2018
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26. Mechanical properties and morphological characteristics of ARALL reinforced with TRGO doped epoxy resin
ABSTRACT Mechanical properties in tension, bending, fatigue and lap-shear in two different proportions (0.5%wt and 1%wt) of TRGO (Thermally Reduced Graphite Oxide) doped ARALL (Aramid Aluminium Laminate) were examined. The materials and their failure modes were characterized morphologically by examination through SEM (Scanning Electron Microscopy). Some mech
Matéria (Rio J.). Publicado em: 06/12/2018
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27. Electrode Material Containing Graphite Incorporated to an Amino-Functionalized Polydimethylsiloxane Network for the Detection of Copper
Graphite was incorporated to a polydimethylsiloxane (PDMS) polymer network functionalized with amino groups to obtain an electrode material and used to detect copper ions in aqueous solutions and sugarcane spirit. The polymer network was prepared with PDMS, 3-aminopropyl-trimethoxysilane (APTMS), tetraethyl orthosilicate (TEOS) with addition of graphite to o
J. Braz. Chem. Soc.. Publicado em: 2018-08
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28. Controller for a SPS machine: a proposal PI control
ABSTRACT Temperature control is the key to effective sintering process for metal, ceramic and polymer powders. The original control temperature provides an irregular control operation process which affects the material properties due to the spacer involved in it. Furthermore, it is analyzed how the material responds to an electrical input determining a model
Matéria (Rio J.). Publicado em: 19/07/2018
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29. Estudio del comportamiento de fundición CADI sometida a FCR
ABSTRACT Ductile Iron (DI) is a development of the iron alloys introduced in the ´50s, with free graphite in the form of nodules. Austempered Ductile Iron (ADI) is a development of DI later introduced, consisting on austempering heat treatment in order to obtain a high strength and high toughness material. Carbidic Austempered Ductile Iron (CADI) is a more
Matéria (Rio J.). Publicado em: 19/07/2018
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30. 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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31. Efecto electrocatalítico de nanopartículas bimetálicas de Ag y Cd hacia la reducción de iones nitrato y/o nitrito
ABSTRACT The electrocatalytic effect of Cd-Ag bimetallic nanoparticles supported on highly oriented pyrolytic graphite (HOPG) and vitreous carbon (VC) substrates was evaluated for the nitrate and/or nitrite ions reduction reaction. For this, in a first stage, the metallic and bimetallic deposits were obtained on the carbonaceous substrates (CS) using the ele
Matéria (Rio J.). Publicado em: 19/07/2018
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32. Synthesis of Graphene Oxide and Functionalized CNT Nanocomposites Based on Epoxy Resin
ABSTRACT Lately, nanomaterials have been largely studied as reinforcements for epoxy resin. Although their usage is highly promising, the literature has reported some drawbacks regarding the improvement of mechanical properties in nanocomposites. These difficulties are usually due to dispersion of nanomaterials and its adhesion to the polymeric matrix. One a
J. Aerosp. Technol. Manag.. Publicado em: 16/07/2018
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33. Amorphization of Graphite Flakes in Gray Cast Iron Under Tribological Load
A gray cast iron disc, which had been submitted to a heavy duty automotive brake test, was examined with energy filtered transmission electron microscopy. A graphite flake in a convenient angular position showed the shear interaction of graphite layers with the iron matrix in nano-scale resolution. Atomic layers of graphite were wedged into the ferritic bulk
Mat. Res.. Publicado em: 28/05/2018
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34. Copper/Iron Brake Friction for Military Aircraft Application
ABSTRACT: The present study assesses the influence of non-metallic constituents and manufacturing parameters, such as compaction pressure and sintering temperature, to produce a metal matrix composite (MMC) of copper/iron, based on the brake disc of aircraft AT-29 SuperTucano. The samples were produced with six different compositions, by varying the amount o
J. Aerosp. Technol. Manag.. Publicado em: 03/05/2018
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35. Free vibration analysis and design optimization of SMA/Graphite/Epoxy composite shells in thermal environments
Abstract Composite shells, which are being widely used in engineering applications, are often under thermal loads. Thermal loads usually bring thermal stresses in the structure which can significantly affect its static and dynamic behaviors. One of the possible solutions for this matter is embedding Shape Memory Alloy (SMA) wires into the structure. In the
Lat. Am. j. solids struct.. Publicado em: 23/04/2018
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36. Replacement of fluorspar in the desulfurization of hot metal
Abstract In the steel industry, lime is used as a desulfurizing agent and fluorspar as flux in the hot metal desulfurization process. However there are environmental concerns regarding the use of fluorspar, even when its harmful effects are not fully known. In order to reduce such risks and also to anticipate possible future restrictions, which could undermi
REM, Int. Eng. J.. Publicado em: 2018-04