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Propriedades mecânicas e microestruturais de aços de alta resistência e baixa liga soldados
(2014-05-21)
In the present work we investigated the mechanical and microstructural proprieties of the ZSTE380 and DOGAL800 high strength low alloys steels (HSLA), comparing to the conventional ZAR230 steel, before and after welding. ...
Avaliação de métodos de fabricação de mantas híbridas de fibras curtas de vidro e sisal em compósitos poliméricos
(2014-05-22)
This work is focused at development and evaluation of confection methods of short fibers hybrid mants aiming attend the necessities of automobile industry in the production of small parts with smaller cost and specific ...
Conformação de molas cerâmicas por moldagem por injeção em baixa pressão
(2014-05-15)
In this work the low-pressure injection molding (LPIM) of submicrometer-sized ceramic powders was studied aiming to produce ceramic springs. The work comprised the production of molds and laboratory equipment for injection ...
Caracterização da integridade de superfícies usinadas para produção de moldes e matrizes
(2014-05-14)
This work includes the conventional way of die and mold production. Process such as milling, EDM and sanding are discussed. These three processes of die and mold making were applied to the AISI H13 material, that is wide ...
Análise modal de materiais compósitos
(2014-05-14)
A modal analysis procedure for composites is presented in this work. Procedures employed to aim this objective can be divided into three groups: mass-balance, image analysis and point-counting. The mass-balance methods are ...
Estudo de variáveis de composição e processo para controle da compressibilidade
(2014-05-14)
Brake pads for automotive brake systems represent one of the most complex composite materials since they contain many components with widely varying physical and chemical properties. This multiphase nature is necessary to ...
Desenvolvimento e caracterização de compósitos sanduíche para isolamento térmico
(2014-05-29)
A sandwich panel consists essentially of two face sheets and may even have metal reinforcements and a core formed, usually by a cellular polymer. The faces of this type of panel may be joined by a structural adhesive or ...
Modificação da superfície do polipropileno por imersão em plasma de baixa energia
(2014-05-23)
The use of low energy plasma immersion with active screen as a convenient approach for polypropylene (PP) surface modification is described in this work. Employing a stainless steel cathodic cage coated with carbon in order ...
Propriedades estruturais e mecânicas do carbeto de vanádio obtido por magnetron sputtering reativo
(2014-05-22)
The use of hard coatings has many applications in the metal-mechanic industry due to the improvement of surface properties such as high hardness and wear and corrosion resistance. One of the most important techniques for ...
Transporte atômico e reação química em nanoestruturas TiN e TiN/Ti em aço nitretado a plasma
(2014-05-28)
The use of cutting tools in progressively more severe conditions in the metal-mechanics industry and the requirement to increase tool life against friction, wear and high temperature corrosion made of surface treatments ...
Avaliação comparativa de desempenho ambiental de duas caixas de carga de semi-reboque bitrem graneleiro: compósito natural versus compósito sintético
(2014-05-19)
This work presents a comparative evaluation of the environmental performance of two materials: a wood panel and a three layers synthetic panel, both used in the production of the load box of semi-trailer for grains ...
Análise de superfícies fresadas por diferentes estratégias em aço AISI H13 endurecido
(2014-05-20)
In the final milling process of free form surfaces, commonly employed in the production of molds and dies, the knowledge of the cutting conditions and a strategy for choosing adequate processing routes in the milling of ...
Processamento de compósitos de poli (tereftalato de etileno) reciclado reforçado com fibras de vidro
(2014-05-15)
In this work, flake and post-condensed PET composites of different glass fiber contents (0, 20, 30 and 40%) were prepared. Tow kinds of fibers were employed: one fiber having an amino silane-based surface treatment and ...
Preparação e caracterização de membranas poliméricas de poli(fluoreto de vinilideno) para uso em nanofiltração
(2014-06-03)
The search for increasingly efficient technologies in water and effluent treatment made the development of membranes take on an important role in separation processes. The nanofiltration is presented as a promising technology ...
Reação de desinserção em SbxCoSb3-x
(2014-06-03)
The compound SbxCoSb3-x was produced at high pressures and high temperatures in a self-insertion reaction from the binary skutterudite CoSb3. The self-insertion reaction is characterized by the collapse of Sb atoms to the ...
Estudo da influência do lubrificante sólido MoS2 nas propriedades de revestimentos protetores de TiN
(2014-06-03)
In this study we investigated the protective coating of titanium nitride using incorporation of molybdenum disulfide as a solid lubricant, seeking application in parts and cutting tools in the metal working industry. This ...
Avaliação de diferentes potenciais interatômicos no cálculo do tensor de elasticidade do tungstato de zircônio
(2014-05-28)
Zirconium tungstate (ZrW2O8) is a material that exhibits negative thermal expansion (NTE), over a wide temperature range (0.3 at 1050 K). Although thoroughly studied, controversies still remain concerning the microscopic ...
Síntese e caracterização de revestimentos protetores de ZrN/TiN sobre o biomaterial Nitinol obtidos por tratamento duplex.
(2014-06-05)
The present work aims to study about duplex treatment on the biomaterial Nitinol (NiTi). This treatment consists in titanium nitride (TiN) formed by plasma nitration, followed by zirconium nitride (ZrN) thin film deposition ...
Influência da temperatura de sinterização nas propriedades mecânicas de molas de alumina injetadas em baixa pressão
(2014-06-05)
In this work, ceramic coil springs was prepared by low-pressure injection molding using alumina submicrometer-sized powder. The powder are mixed with organic binders in the Pelstman machine tank for several hours resulting ...