Composite Coatings
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Effect of TiC Particles Concentration on Microstructure and Properties of Ni-TiC Composite Coatings
A kind of novel anti-wear Ni-TiC composite coatings was deposited successfully on 42CrMo steel by pulsed electrodeposition method with various TiC particles concentration. The effect of TiC concentration on morphologies and properties of Ni-TiC composite coatings were investigated and the optimum concentration of TiC particle was obtained. Results demonstrat
Mat. Res.. Publicado em: 20/01/2020
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2. About the use of semi-continuity in simply supported composite steel and concrete beams, to remove fireproof coatings for standard-fire resistance requirement of less than 30 minutes
Resumo Estudos anteriores do comportamento sob ação do incêndio de vigas mistas de aço e concreto, sem instabilidades locais (ditas compactas), considerando a rigidez à flexão nos apoios fornecida pela armadura negativa longitudinal à viga (semicontinuidade), mostraram que não é possível justificar a ausência de revestimento contra fogo para tempo
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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3. Atomization Characteristics of Droplet and Morphologies of Arc Sprayed Ni-Al Particles and Composition Coatings
Droplet atomization characteristics and its morphology in twin-wire arc sprayed (TWAS) Ni-Al were explored in depth. Both numerical model and theoretical method were built for calculating the process of the droplet deformation and breakup in air flow, which based on the standard k-ε model and the volume of fluid (VOF) dual-phase flow model. The atomization
Mat. Res.. Publicado em: 23/09/2019
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4. Characterization of new selective coatings, made of granite and chrome, for solar collectors
ABSTRACT The depletion of fossil fuel reserves and climate change caused by atmospheric pollution has led the human being to seek alternatives that are less damaging to the environment. The concern and the awareness of the population open space for the study of renewable energies to be deepened, among them the best use of solar energy. The use of alternative
Matéria (Rio J.). Publicado em: 10/06/2019
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5. Microstructure and Wear Resistance of ZrC-ZrB2 /Ni Composite Coatings Prepared by Plasma Transferred Arc Cladding
The ZrC-ZrB2/Ni metal matrix composite coatings were in-situ synthesized from a mixture of Ni, Zr and B4C by plasma transferred arc (PTA) cladding process. Microstructures and phase constituents of the coatings were characterized by electron probe micro-analyzer (EPMA) and X-ray diffraction (XRD). Microhardness and wear resistance of the coatings were system
Mat. Res.. Publicado em: 06/05/2019
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6. Investigation on the Wear Properties of Ti/TiC/TiN Composite Coatings Prepared by Powder Cored Wires Through TIG Method at Nitrogen Atmosphere on Titanium Substrate
In this present study, Tungsten Inert Gas (TIG) welding and powder filled cored wires with nitrogen shielding gas were utilized to produce TiC and TiN surface composite coatings on the titanium (Ti) sheet substrate. The TIG procedure was done at same welding parameters for all of prepared samples. Phase analysis and microstructures were done by X-ray Diffrac
Mat. Res.. Publicado em: 15/04/2019
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7. Fabricación de recubrimientos compuestos de Bioglass®/poli(ɛ-capro-lactona) obtenidos por co-deposición electroforética sobre acero inoxidable
ABSTRACT In this work two kinds of "soft coatings" were obtained by co-electrophoretic deposition technique (co-EPD). In all cases a bioglass was used as inorganic phase, and a commercial poly(ɛ-caprolactone), (PCLC), and an anionic synthesized PCL modified with maleic anhydride (PCLS) were used as organic phase. To ensure an adequate coating over the metal
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Surface, microstructural, and adhesion strength investigations of a bioactive hydroxyapatite-titanium oxide ceramic coating applied to Ti-6Al-4V alloys by plasma thermal spraying
Ti-6Al-4V alloy is employed in implants because of its good mechanical strength, excellent biocompatibility, and good resistance to corrosion in biological environments. Herein, a composite (HAp-TiO2, 50% by volume of both components) coating surface employing Ti-6Al-4V was characterized. Samples were analyzed post fabrication and post heat treatment to anal
Mat. Res.. Publicado em: 28/05/2018
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9. Pulse Eletrodeposition of Ni/nano-Al2O3 Composite Coatings on Cast Iron Cylinder Liner
Ni/nano-Al2O3 composite coating by pulse electrodeposition method has been used for coating on cast iron liner material. The hardness has been increased from 308 HV to 1050 HV through conventional Watts bath and by applying Taguchi's optimization technique with optimum parameters of pulse frequency 120 Hz, duty cycle 40% and peak current density 0.7A/cm2. Th
Mat. Res.. Publicado em: 26/03/2018
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10. Microstructure and Flight Behaviors of Droplet and its Solidification in Twin-Wire Arc Sprayed Ni-Al Composite Coatings
Droplet flight and solidification behaviors during twin-wire arc sprayed (TWAS) composite coatings were systematically investigated. Both theoretical model and numerical method were established for calculating the droplet deformation, breakup and solidification process in air flow based on the volume of fluid (VOF) dual-phase flow model jointed with the stan
Mat. Res.. Publicado em: 19/03/2018
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11. Laser Cladding of Fe-based Metallic Glass/MoS2 Self-lubricating Composites: Effect of Power and Scanning Speed
MoS2 powder has been used to form "self-lubricating" composite coatings, which are very useful to increase the lifetime of machines where liquid lubricants cannot be used. In this work, amorphous overspray powder of Fe60Cr8Nb8B24 (at%) alloy was mixed with 5wt.% MoS2 powder and it was used to produce single tracks on AISI 1020 steel substrates by laser cladd
Mat. Res.. Publicado em: 01/02/2018
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12. Evaluation of Biopolimeric Films of Cassava Starch with Incorporation of Clay Modified by Ionic Exchange and its Application as a Coating in a Fruit
Coatings technologies with biopolymeric films are effective in maintaining the chemical and sensory characteristics of several fruits. Cassava starch is an attractive biopolymeric because of its renewable characteristics and low cost, but it has a high transfer rate of water vapor. Hydrophilic compounds of organically modified montmorillonite clay by ion exc
Mat. Res.. Publicado em: 22/01/2018