Effect of graphene addition on the mechanical characteristics of AA7075 aluminium nanocomposites
| Autor: | J. Yoganandh, S. Sathiesh Kumar, M. S. Senthil Saravanan, R. Ranga Raj |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Inorganic Chemistry law Aluminium Materials Chemistry Aluminium alloy Composite material Nanocomposite Renewable Energy Sustainability and the Environment Graphene Process Chemistry and Technology Organic Chemistry Abrasive 021001 nanoscience & nanotechnology Grain size 0104 chemical sciences chemistry Transmission electron microscopy visual_art Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Carbon Letters. 31:125-136 |
| ISSN: | 2233-4998 1976-4251 |
| Popis: | Processing and characterization of graphene (Gr)-reinforced aluminium alloy 7075 (AA7075) microcomposites and nanocomposites are reported in this work. Composites are fabricated by mechanical alloying process at wet conditions. The bulk composites are prepared by uniaxial die pressing to get higher densification and sintered in an inert atmosphere. Density of the nanocomposites is higher than the microcomposites due to the reduction of grain size by increased milling time. X-ray diffraction (XRD) analysis confirms graphene interaction with the AA7075 matrix lattice spaces. The effective distribution of graphene with aluminium alloy is further confirmed by the Transmission Electron Microscopy (TEM) analysis. The hardness of the composites proportionally increases with the graphene addition owing to grain refinement. Wear morphology is characterized using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). Microcomposites reveal abrasive and ploughing wear mechanism of material removal from the surface. Nanocomposites show adhesive wear with delamination and particle pull-out from the material surface. |
| Databáze: | OpenAIRE |
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