Processing of an AA7050/Al Hybrid Composites Reinforced with Multiwalled Carbon Nanotubes
| Autor: | Thiago H. R. da Cunha, Marcos Felisberto, Paulo Roberto Cetlin, E.M. Mazzer, Luana A. Batista |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Composite number Alloy Carbon nanotubes Hybrid composite Carbon nanotube Aluminum composite engineering.material Hot pressing Indentation hardness law.invention Precipitation hardening law Powder metallurgy General Materials Science Composite material Materials of engineering and construction. Mechanics of materials Mechanical Engineering Al/CNT composite Condensed Matter Physics Mechanics of Materials TA401-492 engineering Extrusion Metal matrix composites |
| Zdroj: | Materials Research, Volume: 24, Issue: 5, Article number: e20210077, Published: 06 AUG 2021 Materials Research, Vol 24, Iss 5 (2021) Materials Research v.24 n.5 2021 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
| Popis: | The development of carbon nanotubes reinforced metal matrix composites merits relevant attention due to its capacity of improve the hardness and strength of the metal. However, the production of this kind of composite presents many challenges, such as the dispersion and adhesion of carbon nanotubes in the metallic matrix, wich may affect the composite consolidation. The present study aimed the development of composites using an age hardening aluminum alloy reinforced with 0.5 wt.% of multiwalled carbon nanotubes (MWCNT) as well as a hybrid composite based on the mixture of pure aluminum powder and the former composite. AA7050 alloy and pure aluminum matrix composites were processed by ultrasonic mixing, hot pressing and hot extrusion. Subsequently, the materials were submitted to aging heat treatments. The samples were analysed by Scanning Electron Microscopy, X-Ray Diffraction, Atomic Force Spectroscopy, Raman spectroscopy, and Vickers microhardness. It was verified the feasibility in manufacturing the composites by the powder metallurgy route proposed in this work. The AA7050 composite reinforced with 0.5 wt.% MWCNT presented higher hardness than other similar composites in the literature with higher carbon nanotubes content. The aged composite hardness increased 72% in comparison with the present one in the as extruded condition. |
| Databáze: | OpenAIRE |
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