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Aperfeiçoamento da adesão de filmes finos de carbono amorfo hidrogenado através do entendimento físico-químico de intercamadas de silício
(2018-04-19)
The diamond-like carbon (DLC) thin films family, in particular hydrogenated amorphous carbon films (a-C:H) have interesting properties for academic and technological purposes. High wear and ultra-low friction can be found ...
Preparação, caracterização e aplicação de filmes finos nanoestruturados de PAH/PAA/TiO2 na fotoxidação de ibuprofeno
(2018-08-22)
Ibuprofen is an anti-inflammatory with an annual production of more than 15 thousand tons, whose concentration in aquatic ecosystems reaches the order of tens of μg L-1. The degradation of this emerging pollutant and other ...
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 ...
Revulcanização de rejeito industrial de copolímero de butadieno e estireno (SBR)
(2014-05-05)
The objective of this work was to develope and characterize SBR industrial scraps vulcanizable formulations with technological applications. Firstly, SBR scraps were collected in accordance with the standard NBR 10007. ...
Estudo da substituição de aço convencional por aço de baixa liga e alta resistência (BLAR) em módulo estrutural
(2014-05-05)
Two kinds of steel were studied, conventional steel ZAR 230 (a standard for high strength galvanizing) and microalloyed steel ZSTE 380 (according to the regulation SEW 093). The study of its mechanical properties aimed to ...
Incorporação de polietileno pós-consumo em espumas de polietileno de baixa densidade
(2014-05-05)
The use of waste polyethylene (p-PE) in low-density polyethylene (LDPE) foams that have azodicarbonamide (ACA) as blowing agent is the topic of this paper. It characterizes used polymers, and p-PE is made of a mixture of ...
Tratamento de lixiviado através de filtro anaeróbio associado a membrana de microfiltração
(2014-05-12)
Nowadays, the use of membrane bioreactors (MBRs) has been researched in many places of the world to treat different kinds of wastewater. The use of MBRs has advantages over other processes when the main focus is on the ...
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 ...