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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 ...
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 ...
Avaliação química, microestrutural e tribológica de filmes finos de TiCxNy produzidos por arco catódico para aplicações decorativas
(2016-11-24)
The deposition of thin films can be employed to modify and/or functionalize the properties of a material’s surface, improving wear resistance (tribological properties) or changing the resistivity (electrical properties). ...
Deposição e caracterização de filmes finos de nitreto de titânio para aplicações decorativas
(2015-02-11)
This work studies the deposition of titanium nitride (TiN) thin films on stainless steel AISI 304 substrate for decorative applications. The films studied here are composed of a layer of Ti working as an interlayer between ...
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 ...
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 da incorporação de nanopartículas de ouro em filmes automontados de polieletrólitos fracos
(2014-06-05)
Nanotechnology has brought some new challenges such as the development of quality and synthesis processes on nanostructures based on inorganic and organic substances. The development of new materials with organic and ...
Efeito da oxidação nas análises de dureza e atrito em filmes finos de Si3N4
(2014-06-23)
Hard coatings are widely used in surface engineering of mechanical components due to
their high wear resistance and reduced friction coefficients. Actually, the dry cutting techniques
are demanding new materials with ...
Fotossensibilizadores nanoestruturados por sistema camada por camada
(2014-06-05)
The search for materials that can be modified at molecular level has been the subject of several studies worldwide. Thus, the production techniques of thin films stand out due to the possibility of reducing costs and ...