Effect of GNPs content at various compaction pressures and sintering temperatures on the mechanical and electrical properties of hybrid Cu/Al2O3/xGNPs nanocomposites synthesized by high energy ball milling

Abu–Okail, Mohamed; Shewakh, Walid Mahmoud; Brisha, Ayman M.; Abdelraouf, Yasmin A.; Abu-Oqail, Ahmed

doi:10.1016/j.ceramint.2020.04.120

Cited by 21 publications

(9 citation statements)

References 42 publications

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“… The procedures of dispersion, hand lay-up technique, and compression mold technology. Note: the images of Al 2 O 3 and GNP nanoparticles were taken from reference [ 40 ]. …”

Section: Figurementioning

confidence: 99%

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Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

et al. 2021

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The multiscale hybridization of ceramic nanoparticles incorporated into polymer matrices reinforced with hybrid fibers offers a new opportunity to develop high-performance, multifunctional composites, especially for applications in aeronautical structures. In this study, two different kinds of hybrid fibers were selected, woven carbon and glass fiber, while two different ceramic nanoparticles, alumina (Al2O3) and graphene nanoplatelets (GNPs), were chosen to incorporate into a polymer matrix (epoxy resin). To obtain good dispersion of additive nanoparticles within the resin matrix, the ultrasonication technique was implemented. The microstructure, XRD patterns, hardness, and tensile properties of the fabricated composites were investigated here. Microstructural characterization demonstrated a good dispersion of ceramic nanoparticles of Al2O3 and GNPs in the fabricated composites. The addition of GNPs/Al2O3 nanoparticles as additive reinforcements to the fiber-reinforced polymers (FRPs) induced a significant increase in the hardness and tensile strength. Generally, the FRPs with 3 wt.% nano-Al2O3 enhanced composites exhibit higher tensile strength as compared with all other sets of composites. Particularly, the tensile strength was improved from 133 MPa in the unreinforced specimen to 230 MPa in the reinforced specimen with 3 wt.% Al2O3. This can be attributed to the better distribution of nanoparticles in the resin polymer, which, in turn, induces proper stress transfer from the matrix to the fiber phase. The hybrid mode mechanism depends on the interaction among the mechanical properties of fiber, the physical and chemical evolution of resin, the bonding properties of the fiber/resin interface, and the service environment. Therefore, the hybrid mode of woven carbon and glass fibers at a volume fraction of 64% with additive nanoparticles of GNPs/Al2O3 within the resin was appropriate to produce aeronautical structures with extraordinary properties.

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“… The procedures of dispersion, hand lay-up technique, and compression mold technology. Note: the images of Al 2 O 3 and GNP nanoparticles were taken from reference [ 40 ]. …”

Section: Figurementioning

confidence: 99%

“…et al [ 39 ] demonstrated that epoxy composites containing a small number of ceramic nanoparticles increase the lifespan of the product. Therefore, GNPs and Al 2 O 3 were selected in this study to fabricate formulations of composite materials with extraordinary and unique mechanical properties [ 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

et al. 2021

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“…According to microstructure observations in figure 7, by SEM it can be noted that, the grain formed and elongated, this due to several items (i) Post weld heat treatment (ii) redistributions of the grains (good homogeneity) (iii) the appearance of dissimilar grains.Finally according to SEM, there are good connections between matrix and reinforcement elements [13,14], this is due to PWHT conditions.…”

Section: Macro and Microstructural Analysis Of Produced Jointsmentioning

confidence: 95%

An investigation of post-weld heat treatment of friction stir welded aluminium blanks AA2024 embedded with AA7075

Saad

Ibrahem

Abu–Okail

et al. 2022

J. Phys.: Conf. Ser.

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This article is focused main problem during and after FSW especially when joining blanks AA2024 embedded with interlayer strip widths AA7075, in microstructure of the welded zone, that will in turn affect its mechanical properties of the welded joints. So, a number of interlock strip widths of AA7075 as 1, 1.5, 2, 2.5 and 3 mm were added between two substrates of base metal AA2024 during FSW technique then followed heating and cooling procedures to incorporate into the heat treatment process, which is conducted to create changes in a material’s microstructure that will in turn affect its mechanical properties. The analyses by optical microscope and scanning electron microscope were used to clarify microstructural characterization of FSWed with interlock strip widths after PWHTed. On the other hand, the microhardness and tensile tests were performed to determine mechanical properties of FSWed with interlock strip widths after PWHTed. The observations of microstructural elucidated that the good bonding connection between interlayer strip widths AA7075 and base metal AA2024 was due to use the procedures of PWHT. The mechanical properties such as microhardness and tensile of produced joints with PWHTed were showed higher than without PWHTed. Specifically, the ultimate tensile strength, and hardness values of the post-heat joint when using 3mm interlayer strip were obtained the highest values 299MPa, 186 HV respectively. This presents improvement by 11.2% in tensile strength, and 84% in hardness, compared to as weld joint.

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“…To further improve the thermo-electrical conductivity, mechanical and wear performance of Cu-Al 2 O 3 composites, it is necessary to add reinforcements with lubricating properties such as graphit or graphite. 12 In addition to its lubricating properties graphite is known to adversely affect mechanical and tribological properties due to its excessive use. 13 Graphite has strong self-lubricating qualities because of its layered structure, which allows it to create lubricating and transferring layers on the surfaces of metallic powder particles while sliding.…”

Section: Introductionmentioning

confidence: 99%

Development of the hardness, three-point bending, and wear behavior of self-lubricating Cu-5Gr/Al₂O₃-Cr₃C₂ hybrid composites

Şap

Usca

Uzun

et al. 2023

Journal of Composite Materials

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This research aims to assess the mechanical characteristics of high-performance copper composites made utilizing powder metallurgy. The composites were produced by adding reinforcement elements (Al2O3-Cr3C2) at different rates (3-6–9 wt.%) into copper-graphite (Cu-5Gr) via hot pressing technique. The microstructure, hardness, three-point bending and wear performance were analysed. The results determined that hybrid reinforced composites exhibited higher density, hardness and bending strength compared to Cu-Gr composites. The highest hardness of 73.02 HB was found in the CG-4 (copper graphit-4) sample. The maximum bending stress of 151.06 MPa occurred in sample CG-2. In addition, it was observed that the wear resistance increased significantly with the addition of the hybrid reinforcements. The lowest specific wear rate of 7.961 × 10−7 mm3/N.m occurred in sample CG-6. As a result, 15.92%, 58.16% and 83.21% improvements were achieved in hardness, bending strength and wear performance, respectively. The current work indicates that certain mechanical properties of copper can be improved via the powder metallurgy process and the addition of reinforcements which could expand the applications and use of this metal in different industries.

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Effect of GNPs content at various compaction pressures and sintering temperatures on the mechanical and electrical properties of hybrid Cu/Al2O3/xGNPs nanocomposites synthesized by high energy ball milling

Cited by 21 publications

References 42 publications

Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

An investigation of post-weld heat treatment of friction stir welded aluminium blanks AA2024 embedded with AA7075

Development of the hardness, three-point bending, and wear behavior of self-lubricating Cu-5Gr/Al₂O₃-Cr₃C₂ hybrid composites

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Effect of GNPs content at various compaction pressures and sintering temperatures on the mechanical and electrical properties of hybrid Cu/Al2O3/xGNPs nanocomposites synthesized by high energy ball milling

Cited by 21 publications

References 42 publications

Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

Synthesis and Characterization of Hybrid Fiber-Reinforced Polymer by Adding Ceramic Nanoparticles for Aeronautical Structural Applications

An investigation of post-weld heat treatment of friction stir welded aluminium blanks AA2024 embedded with AA7075

Development of the hardness, three-point bending, and wear behavior of self-lubricating Cu-5Gr/Al2O3-Cr3C2 hybrid composites

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Product

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Development of the hardness, three-point bending, and wear behavior of self-lubricating Cu-5Gr/Al₂O₃-Cr₃C₂ hybrid composites