Comparison of Cold-Sprayed Coatings of Copper-Based Composite Deposited on AZ31B Magnesium Alloy and 6061 T6 Aluminum Alloy Substrates

Materials, Год журнала: 2023, Номер 16(14), С. 5120 - 5120

Опубликована: Июль 20, 2023

Copper-coated graphite and copper mixture powders were deposited on AZ31B magnesium alloy 6061 T6 aluminum substrates under different process parameters by a solid-state cold spray technique. The microstructure of the copper-coated composite coatings was visually examined using photographs taken with an optical microscope scanning electron microscope. surface roughness investigated 3D profilometer. thickness determined through analysis images, while adhesion characterized scratch test method. results indicate that sprayed two gradually decreases as gas temperature pressure increase. Additionally, both increase in pressure. Comparing roughness, thickness, substrates, soft substrate are greater than those hard substrate, is not obviously affected hardness substrate. Furthermore, it noteworthy exhibit distinct linear relationship particle velocity.

Язык: Английский

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Critical velocity and deposition efficiency in cold spray: A reduced-order model and experimental validation

Journal of Manufacturing Processes, Год журнала: 2025, Номер 134, С. 547 - 557

Опубликована: Янв. 1, 2025

Язык: Английский

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One-step fabrication of functionalized electrodes on 3D-printed polymers for triboelectric nanogenerators

Nano Energy, Год журнала: 2024, Номер 129, С. 110082 - 110082

Опубликована: Авг. 3, 2024

Язык: Английский

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Selective Surface Metallization of 3D-Printed Polymers by Cold-Spray-Assisted Electroless Deposition

ACS Applied Electronic Materials, Год журнала: 2023, Номер 5(9), С. 5164 - 5175

Опубликована: Сен. 1, 2023

Selective surface metallization of insulating polymers is particular interest in smart films, energy harvesting, and sensing applications. However, traditional polymer techniques face challenges due to the need for environmentally hazardous pretreatment (e.g., strong acid etching) cost-intensive palladium seeding processes, thereby limiting large-scale deployment metallized polymers. With advent rapid prototyping, on additively manufactured drew attention a variety technological applications, as it enables fabrication low-cost electronic devices. In current work, we deploy evaluate hybrid additive route that can enable functional selective 3D-printed eco-friendly methodology with improved electrical conductivity. The sequentially comprises (1) material extrusion 3D printing, (2) cold spray metallization, (3) electroless deposition. resulting metal (copper) layers surfaces are characterized terms microstructure, chemistry, wettability, Notably, promising conductivity (i.e., 6.47 × 106 S m–1 ABS 5.27 PLA parts) achieved both linear curvilinear surfaces. Moreover, adhesion between layer structures was confirmed by tests. Detailed evaluation proposed unlocks great potential advance field conductive

Язык: Английский

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Developing Hydrophilic Teflon via Cold Spray

˜The œminerals, metals & materials series, Год журнала: 2025, Номер unknown, С. 461 - 470

Опубликована: Янв. 1, 2025

Язык: Английский

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O uso do podcast na educação básica: análise de tendências e práticas recentes

Cuadernos de Educación y Desarrollo, Год журнала: 2025, Номер 17(5), С. e8306 - e8306

Опубликована: Май 12, 2025

Este artigo analisou o uso de podcasts como ferramenta pedagógica na Educação Básica, identificando práticas, tendências e impactos. A pesquisa, baseada em revisão sistemática da literatura com abordagem qualitativa, examinou 13 estudos base CAPES. Os resultados indicam que os são amplamente adotados recurso complementar, proporcionando flexibilidade, personalização do aprendizado maior autonomia dos alunos. Foram observadas diversas desde a produção conteúdos pelos próprios estudantes até episódios para enriquecer currículo. Conclui-se diversificam as estratégias pedagógicas tornam mais dinâmico. No entanto, há necessidade sobre suas melhores práticas impactos longo prazo, considerando seu potencial transformar apresentação absorção educacionais.

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Cold spray direct writing of flexible electrodes for enhanced performance triboelectric nanogenerators

Journal of Manufacturing Processes, Год журнала: 2023, Номер 100, С. 27 - 33

Опубликована: Май 10, 2023

Язык: Английский

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Fully Additively Manufactured Counter Electrodes for Dye-Sensitized Solar Cells

Micromachines, Год журнала: 2024, Номер 15(4), С. 464 - 464

Опубликована: Март 29, 2024

In dye-sensitized solar cells (DSSCs), the counter electrode (CE) plays a crucial role as an electron transfer agent and regenerator of redox couple. Unlike conventional CEs that are generally made glass-based substrates (e.g., FTO/glass), polymer appear to be emerging candidates, owing their intrinsic properties lightweight, high durability, low cost. Despite great promise, current manufacturing methods on polymeric suffer from serious limitations, including conductivity, scalability, process complexity, need for dedicated vacuum equipment. present study, we employ evaluate fully additive route can enable fabrication DSSCs in high-throughput eco-friendly manner with improved performance. The proposed approach sequentially comprises: (1) material extrusion 3-D printing substrate; (2) conductive surface metallization through cold spray particle deposition; (3) over-coating thin-layer catalyzer graphite pencil. fabricated electrodes characterized terms microstructure, electrical photo-conversion efficiency. Owing its promising conductivity (8.5 × 104 S·m−1) micro-rough structure (Ra ≈ 6.32 µm), additively manufactured led ≈2.5-times-higher efficiency than traditional FTO/glass. results study suggest advance field by addressing limitations CE platforms.

Язык: Английский

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Highly Flexible, Conductive, and Antibacterial Surfaces Toward Multifunctional Flexible Electronics

International Journal of Precision Engineering and Manufacturing-Green Technology, Год журнала: 2024, Номер 11(6), С. 1823 - 1836

Опубликована: Апрель 22, 2024

Язык: Английский

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