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Análise dos modos de falha do revestimento de AlCrN depositado por PVD sobre H13
(2014-06-23)
Moulds, dies and cutting tools are subject to high mechanical stress and/or thermal
stress that, over time, result in failure in such tooling. In the manufacturing process of such
tools there are several steps and, among ...
Comportamento do desgaste e posterior corrosão do sistema duplex AISI 4140 nitretado/CrN em bioetanol combustível
(2014-06-24)
This work shows a study of the tribological and corrosive behaviour of AISI
4140 steel previously quenched and tempered, plasma nitrided and then coated with
CrN thin film, in contact with hydrated ethanol fuel. The ...
Avaliação do teor dos aditivos estabilizantes e das propriedades mecânicas em compostos elastoméricos para lateral de pneu de passeio submetidos ao envelhecimento natural e acelerado
(2015-02-11)
This study aims at analysing the ideal rate of two stabilizers in elastomeric compounds, used in tires that require a long-term performance, submitted to different kinds of aging. The resistance to the aging can be achieved ...
Obtenção e caracterização de espumas vítreas a partir de resíduos de lâmpadas fluorescentes descontaminados de mercúrio
(2015-02-23)
Glass foams are heterophasic materials applied in acoustic and thermal insulation, and compared to other materials, are lightweight and sturdy. Glass foams can be prepared from glass packaging, cathode ray tubes and other ...
Avaliação das propriedades de compósitos de poli(hidroxibutirato-co-valerato) reforçado com fibras de curauá
(2014-07-10)
Composites are materials composed of two or more different materials, forming a heterogeneous class of materials which differ in physical and chemical properties. Recent studies on biodegradable polymer composites reinforced ...
Desenvolvimento de compósitos expandidos de poli(etileno-co-acetato de vinila) - eva reforçados com pó de madeira e com fibra de bananeira
(2014-07-10)
Expanded composites or vegetable fiber-reinforced cell composites are a new emerging class
of materials combining good mechanical properties of reduced density, having superior ability
of energy absorption at impact, as ...
Processamento reativo de nanocompósitos iPP-POSS
(2015-10-06)
The interaction modes of polyhedral oligomeric silsesquioxane (POSS) of closed cages with distinct functional groups were evaluated on isotactic polypropylene (iPP) nanostructuration via reactive processing. POSS were ...
Avaliação físico-química e mecânica de zircônia nitretada a plasma
(2015-05-11)
This paper presents the nitriding experimental investigation of partially yttria stabilized zirconia (3 mol%), in particular, plasma generated by radiofrequency (RF), using two distinct methods: i) plasma nitriding, by ...
Estudo morfológico de uma blenda de I-PP e EPDM com argila
(2015-10-07)
In this work were investigated the morphological, themal and rheological properties of a isotactic polypropylene/ethylene-propylene-diene terpolymer rubber/nanoclay Cloisite 15A composite, prepared by mixed melt and submitted ...
Avaliação da corrosão no aço AISI 4140 nitrocarbonetado e pós-oxidado a plasma em etanol hidratado combustível
(2014-06-24)
Environmental and energy sustainability issues have promoted the search for biofuels
produced from renewable sources, such as ethanol obtained from sugarcane processing.
However, this new generation of biofuels can cause ...