Pecvd
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Effect of DLC Films with and without Silver Nanoparticles Deposited On Titanium Alloy
Resumo O filme de carbono semelhante a diamante (DLC) é um material de revestimento duro e biocompatível que pode impedir a corrosão com liberação de íons metálicos. Este estudo avaliou as características estruturais do filme de DLC, com e sem nanopartículas de prata (Ag), depositadas por plasma (PECVD) em liga de titânio (Ti-6Al-4V) e formação �
Braz. Dent. J.. Publicado em: 28/11/2019
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2. Dependence of Wear and Mechanical Behavior of Nitrocarburized/CrN/DLC Layer on Film Thickness
Diamond-like carbon (DLC) films are amorphous metastable carbon form that provide interesting mechanical and tribological properties. The role of film thickness influence upon wear and mechanical properties is of interest and not yet fully reported. In this study, two samples of previously plasma nitrocarburized, quenched and tempered H13 steel were duplex t
Mat. Res.. Publicado em: 31/01/2019
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3. Tribological behavior of hydrogenated W-C/a-C:H coatings deposited by three different sputtering techniques
Abstract The evolution of structure, mechanical properties and friction behavior of DC magnetron sputtered (DCMS), high power impulse magnetron sputtered (HiPIMS) and high target utilization sputtered (HiTUS) W-C:H coatings was investigated as a function of the addition of acetylene and hydrogen into Ar atmosphere. The gradual addition of reactive gases caus
Cerâmica. Publicado em: 2019-01
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4. Bacterial adhesion on conventional and self-ligating metallic brackets after surface treatment with plasma-polymerized hexamethyldisiloxane
RESUMO Introdução: a deposição de filme de polímero a plasma foi criada para modificar as propriedades de superfície dos braquetes ortodônticos metálicos, com o intuito de inibir a adesão bacteriana. Métodos: filmes finos de polímero de hexametildisiloxano (HMDSO) foram depositados em braquetes ortodônticos de aço inoxidável convencionais (n
Dental Press J. Orthod.. Publicado em: 2017-08
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5. Effects of Different Plasma Nitrided Layers on the Tribological Performance of DLC Coatings
When multifunctional surface engineering processes that combine purpose-oriented phases are applied to soft substrates, a combination of high wear resistance, high load support and low coefficients of friction can be achieved. In this study, the effects of different nitrided layers on the tribological behaviour of a diamond-like carbon (DLC) film deposited o
Mat. Res.. Publicado em: 12/09/2016
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6. DLC Films Grown On Steel Using An Innovator Active Screen System For PECVD Technique
In this work, an active screen plasma discharge system based technology was incorporated in a PECVD reactor for DLC films growth, making it a new development in DLC films deposition. In this case, the active screen system is used to seek better electrons confinement, which might result in high ions density due to the collisions number increase, leading to a
Mat. Res.. Publicado em: 07/07/2016
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7. Macrophages adhesion rate on Ti-6Al-4V substrates: polishing and DLC coating effects
Abstract Introduction Various works have shown that diamond-like carbon (DLC) coatings are able to improve the cells adhesion on prosthesis material and also cause protection against the physical wear. On the other hand there are reports about the effect of substrate polishing, in evidence of that roughness can enhance cell adhesion. In order to compare and
Res. Biomed. Eng.. Publicado em: 2016-06
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8. Syntesis of Carbon Nanostructures Near Room Temperature Using Microwave PECVD
Carbon nanostructures (nanotubes, nanofibers and nanosponges) were synthesized onto Si (001) substrates using a microwave assisted plasma enhanced chemical vapor deposition (PECVD) from C2H2-Ar mixtures at low substrate temperatures (120 °C). Catalytic films (Ni and Cu) 3 nm thick were used. Different structures were formed, depending on the C2H2 partial pr
Mat. Res.. Publicado em: 2015-08
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9. Corrosion resistance of 2024 aluminum alloy coated with plasma deposited a-C:H:Si:O films
AA 2024 aluminum alloy is widely employed in aeronautic and automobilist industries. Its hardness and low density are attractive properties for such industrial areas. However, since it contains copper, it undergoes severe corrosion in aggressive media as saline or low Earth orbit environments. In this work, it was investigated the properties of films deposit
Mat. Res.. Publicado em: 2014-12
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10. Análise de filmes antirreflexo de dióxido de titânio e nitreto de silício em células solares P+NN+
In this work we compared the antireflection coatings of titanium dioxide and silicon nitride for p+nn+ solar cell fabrication. This type of solar cell is more stable in the long term compared to n+pp+ cells and allows obtaining higher efficiencies. TiO2 films were produced by evaporation in high vacuum by electron beam and by chemical vapor deposition at atm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2012
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11. STUDY OF THE TRIBOLOGICAL PROPERTIES OF FLUORINATED AMORPHOUS CARBON FILMS / ESTUDO DAS PROPRIEDADES TRIBOMECÂNICAS DE FILMES DE CARBONO AMORFO FLUORADO
Este trabalho teve como objetivos o estudo das modificações nas propriedades de filmes de carbono amorfo hidrogenado (a-C:H) através do tratamento da sua superfície com plasma de tetrafluoreto de carbono (CF4) e Argônio e a deposição e estudo das propriedades tribológicas de filmes de carbono amorfo fluorado e hidrogenado (a-C:F:H) sobre substrato de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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12. POLIPROPILENO CLARIFICADO RECOBERTO COM FILME DE CARBONO AMORFO HIDROGENADO PELO PROCESSO PECVD
Autor: Paulo Henrique Lopes AguiarResumoEsta dissertação teve como objetivo principal estudar a viabilidade de aplicação de filmes de carbono amorfo hidrogenado (a-C:H), depositado por Plasma Enhanced Chemical Vapour Deposition (PECVD), em embalagens alimentícias de polipropileno clarificado (PPc). Visando principalmente o segmento de garrafas para bebi
Publicado em: 16/11/2012