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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 ...
Físico-química de adesão de filmes de DLC sobre aço AISI 4140 utilizando intercamadas contendo silício
(2015-08-24)
Diamond-like carbon (DLC) is a thin film material that has attracted much attention due to its properties as high wear resistance and super-low friction coefficient. Although silicon-based intermediate layers are employed ...
Obtenção de micro e nanocelulose para preparação de membranas poliméricas como barreira seletiva
(2015-03-04)
The use of polymeric membranes has been extensively studied for separation processes. The study of materials and methodologies for development of such membranes for cost reduction and improvement in their properties are ...
Preparação e caracterização de elastômeros reticulados dinamicamente de PA6-12/EVA
(2015-02-11)
Polymeric materials having good mechanical properties combined with flexibility are requirements to meet changing needs of the industry. These requirements can be met with the production of dynamically vulcanized/crosslinked ...
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 ...
Relação estrutura propriedade da poliamida 6 aditivada com óleo de soja modificado com anidrido maleico
(2015-10-01)
The use of additives from alternative sources to petrochemical has attracted the interest of many academic researches and applications. The inputs as soybean oil have great potential in the polymer modification. However, ...
Influência da restrição do fluxo na microestrutura e nas propriedades mecânicas de compósitos de poliamida 6.6 reforçados por fibras de vidro longas obtidos por injeção
(2014-06-24)
Currently there is a large growth in the use of thermoplastic composites reinforced
with long glass fiber. These composites have the mechanical properties required for
structural and automotive applications, because they ...
Filmes finos de carbono amorfo hidrogenado depositados por plasma DC pulsado melhorado por confinamento eletrostático : teoria e prática
(2014-06-24)
In this work, amorphous hydrogenated carbon (a-C:H) thin films were deposited
using a simple, low cost and efficient pulsed DC - plasma-enhanced chemical vapor
deposition technique improved by electrostatic confinement ...
Preparação e caracterização de filmes nanoestruturados suportados em membrana de celulose contendo nanopartículas de Au e TiO2 para produção de H2
(2014-06-24)
The search for renewable energy sources is a subject of great interest worldwide due to
growing energy demand, instability in oil prices and environmental problems. In this
context, the self-assembled thin films have ...