Plasma Enhanced Chemical Vapor Deposition
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. 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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2. Mechanical Loss Angle Measurement for Stressed thin Film Using Cantilever Ring-Down Method
Mechanical loss of the coating materials, and hence thermal noise from the mirror coatings, is a limiting factor for the sensitivity of the laser interferometer gravitational waves detector at its most sensitive frequency range. Mechanical loss of the thin films are often measured using the cantilever ring-down method. But when the thin film is under stress,
Mat. Res.. Publicado em: 28/05/2018
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3. 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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4. Effects of Aging on Chlorinated Plasma Polymers
Thin films deposited from propanol-chloroform-argon mixtures by plasma enhanced chemical vapor deposition at different partial pressures of chloroform in the feed, CCl, were characterized after two years of aging and their characteristics compared with their as-deposited properties. Film thickness decreased and surface roughness increased with aging. Surface
Mat. Res.. Publicado em: 20/03/2017
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5. 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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6. 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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7. 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
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8. Polipropileno clarificado recoberto com filme de carbono amorfo hidrogenado pelo processo PECVD / Clarified polypropylene coated with hydrogenated amorphous carbon film by PECVD process
This work aimed to study the feasibility of application of clarified polypropylene (cPP) coated with hydrogenated amorphous carbon films (a-C:H) deposited by Plasma Enhanced Chemical Vapour Deposition (PECVD) in food packaging, mainly targeting the segment of bottles for carbonated beverages. For the deposition of films of a-C:H using different deposition pa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/10/2011
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9. Estudo de viabilidade de integração de micro-lâmpadas incandescentes com filtros interferenciais. / Study of viability of integration of incandescent micro-lamps with interferometric filters.
In the present work was realized a study of the viability of integrating two optical devices: incandescent micro-lamps and interferometric filters with the intention of obtaining a single device with specific characteristics. The fabrication of these optical devices was made using dielectric materials, obtained by plasma-enhanced chemical vapor deposition (P
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/2011
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10. Enhanced electrochemical activity using vertically aligned carbon nanotube electrodes grown on carbon fiber
Vertically aligned carbon nanotubes were successfully grown on flexible carbon fibers by plasma enhanced chemical vapor deposition. The diameter of the CNT is controllable by adjusting the thickness of the catalyst Ni layer deposited on the fiber. Vertically aligned nanotubes were grown in a Plasma Enhanced Chemical Deposition system (PECVD) at a temperature
Materials Research. Publicado em: 26/08/2011
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11. Estudo dos parâmetros de deposição de filmes finos de carbono amorfo hidrogenado obtidos pelo processo PECVD em embalagens de PET pós-consumo reciclado / Study of the deposition of thin films of hydrogenated amorphous carbon obtained by PECVD process in packaging recycled post consumer PET
Atualmente, observa-se que os resíduos poliméricos representam uma elevada parcela na composição dos resíduos sólidos urbanos (RSU). Dentre estes materiais tem-se destaque o poli (tereftalato de etileno) (PET) que é um dos principais polímeros consumidos no segmento de embalagens de rápido descarte. Desse modo, a reciclagem de PET visando aplicaçã
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/12/2010
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12. Evaluation of blood compatibility of plasma deposited heparin-like films and SF6 plasma treated surfaces
In devices used in open-heart surgery and dialysis, blood must be continuously processed using extracorporeal circuits composed of peristaltic pumps and active components such as specific filters and oxygenators. Several procedures have been employed to avoid blood coagulation induced by contact with the artificial surfaces of such devices. Often heparin, a
Materials Research. Publicado em: 2010-03