Coated Electrodes
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. A New Electrochemical Platform Based on a Polyurethane Composite Electrode Modified with Magnetic Nanoparticles Coated with Molecularly Imprinted Polymer for the Determination of Estradiol Valerate in Different Matrices
A polyurethane composite electrode modified with magnetic nanoparticles (mag; Fe3O4) coated with molecularly imprinted polymers (MIPs) was developed for the electrochemical determination of estradiol valerate. Chemical and morphological analyses of the mag-MIP were performed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (E
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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2. Mejora de la resistencia al desgaste abrasivo de un revestimiento Fe-Cr-Mn-C mediante la adición de V
ABSTRACT The aim of this work is to increase the abrasive wear resistance of a coating, applied on plates of AISI 1020 carbon steel, using tubular coated electrodes with the Fe-Cr-Mn-C alloy system. In order to achieve this increase, V was added to the alloy system. The resulting coating were studied using optical microscopy (MO), X-ray diffraction and micro
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Development and characterization of gas sensors using thin films of polyaniline as active layer
ABSTRACT This work aimed at the development and characterization of gas sensing devices using thin films of polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity to gases, low response time and stability, ease of synthesis and low cost. The sensor wa
Matéria (Rio J.). Publicado em: 06/12/2018
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4. Efecto del V y el Si Sobre la Microestructura de Depósitos Realizados con Electrodos Tubulares Revestidos de Alto Contenido de Mn (Hadfield)
Abstract: Fe-Mn-C (Hadfield) alloys for surfacing weld deposits have demonstrated excellent wear resistance under high dynamic loads. In recent years, numerous studies have been conducted to improve their wear resistance and performance through the introduction of others alloying elements. In the present work, microstructure and hardness of high Mn surfacing
Soldag. insp.. Publicado em: 09/10/2017
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5. Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells
ABSTRACT Electrodes for electrolyte-supported solid oxide fuel cells (SOFC's) were fabricated by spin coating. Strontium-doped lanthanum manganite (LSM) cathode and nickel yttria-stabilized zirconia cermet anodes were synthesized and processed for enhanced deposition conditions. The influence of electrode microstructural parameters was investigated by a syst
Matéria (Rio J.). Publicado em: 22/05/2017
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6. Evaluación del Deterioro de los Electrodos al Incrementar el Número de Pulsos del Tiempo de Soldadura en Aceros IF y HSLA Galvanizados y la Afectación de las Propiedades Mecánicas en los Puntos de Soldadura
Abstract: Resistance welding points, is the most important method in the assembly industry of unibody because of its automation, which is defined as the ability of the structure to provide adequate protection to passengers against injury from a collision, mainly depends on the mechanical performance of the weld nugget. To extend the life of vehicles produced
Soldag. insp.. Publicado em: 05/01/2017
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7. Effects from Gold Electrodes on the Electron-Phonon Coupling of Poly(p-phenylenevinylene) Films
Interface effects between metal electrodes and organic films are crucial for the overall performance of organic electronics devices. We investigate effects from gold electrodes deposited on spin-coated films of poly(p-phenylene vinylene) (PPV). While a thin Au layer (16 nm) did not affect the absorption and emission spectra of PPV, a 64 nm thick Au layer ind
J. Braz. Chem. Soc.. Publicado em: 2015-09
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8. Synthesis of Poly(Vinylferrocene) Perchlorate/Poly(3,3’-Diaminobenzidine) Modified Electrode in Dichloromethane for Electroanalysis of Hydroquinone
Poly(vinylferrocenium) perchlorate-poly(3,3’-diaminobenzidine) (PVF+ClO4–-PDAB) composite film was synthesized electrochemically for the first time on Pt disc electrode in a dichloromethane solution containing poly(vinylferrocene) (PVF) polymer, 3,3’-diaminobenzidine (DAB) monomer and tetrabutylammonium perchlorate as supporting electrolyte. This modif
J. Braz. Chem. Soc.. Publicado em: 2015-09
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9. Poly(3-octylthiophene)/stearic Acid Langmuir and Langmuir-Blodgett films: Preparation and characterization
A study is reported on Langmuir and Langmuir-Blodgett (LB) films obtained by adding different percentages of stearic acid (SA) to poly(3-octylhiophene) (P3OT). Surface pressure - mean molecular area (π - A) isotherms, ultraviolet-visible (UV-Vis) absorption spectrum, atomic force microscope (AFM) and dc electrical measurements have been used for characteriz
Mat. Res.. Publicado em: 2014-12
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10. Efecto sobre la dilución de la granulometría de la ferroaleación en el alma de electrodos tubulares revestidos bajo la influencia de la composición del revestimiento
The possibility of working at lower current and, consequently, reaching low dilution, points out advantages in the use of metal cored coated electrodes over conventional ones for hardafacing. It is known that the grain size of the filling alloy elements plays important role in the exothermic oxidation process, reflecting on the operational characteristics of
Soldagem & Inspeção. Publicado em: 2011-03
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11. Soldabilidade dos aços DUAL-PHASE 600 e 800 via processo de soldagem a pontos média freqüência corrente contínua (MFDC) e corrente alternada (AC) / Weldability of 600 and 800 Dual-Phase Steels by Using Resistance Spot Welding Medium Frequency Direct Current (MFDC) and Alternating Current (AC)
Dual-Phase steels have been developed to match the automotive-industry need of highresistance materials that lead to weight reduction and, therefore, reducing emissions. Specifically, in the use Resistance Spot Welding (RSW) process, the Medium Frequency Direct Current (MFDC) equipment has been largely introduced in the automotive industry without, however,
Publicado em: 2008
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12. SIMULATION OF ATRAZINE DEGRADATION BY IN SITU ELECTROCHEMICALLY GENERATED OZONE FOR GROUNDWATER REMEDIATION / SIMULAÇÃO DA DEGRADAÇÃO DE ATRAZINA COM OZÔNIO GERADO ELETROQUIMICAMENTE IN SITU PARA REMEDIAÇÃO DE ÁGUAS SUBTERRÂNEAS
The impact of pesticides on the quality of groundwater has been the subject of scientific and public health concerns in the entire planet, especially in areas where groundwater is mainly used for human consumption. The intensive use of pesticides in agriculture and the high persistence of several of these chemicals have required a rigorous control of possibl
Publicado em: 2008