Structural and Mechanical Properties of Al-SiC-ZrO2 Nanocomposites Fabricated by Microwave Sintering Technique

Khan, Arfaat; Abdelrazeq, Motasem Wadi; Mattli, Manohar Reddy; Yusuf, Moinuddin M.; Alashraf, Abdullah; Reddy, M. Penchal; Shakoor, Abdul

doi:10.3390/cryst10100904

Cited by 28 publications

(7 citation statements)

References 44 publications

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“…XRD patterns of S5 were magnified and illustrated in Figure 3 b to clearly signify the presence of Al, crystalline Si 3 N 4 , and GNPs in the matrix. Additionally, it confirms the absence of other impurities in the Al-Si 3 N 4 -GNPs composites showing close adherence with the previous studies [ 27 , 28 ]. The XRD results indicate that phase pure Al-Si 3 N 4 -GNPs composites containing various concentrations of GNPs is successfully developed through the microwave-assisted powder metallurgy route.…”

Section: Resultssupporting

confidence: 92%

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

et al. 2021

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This research work aims at investigating the influence of a fixed content of silicon nitride (Si3N4) and varied contents of graphene nanoplatelets (GNPs) on the physical (density, structural, morphological) and mechanical properties (microhardness, nanoindentation) of Al-Si3N4-GNPs composites. The composites were fabricated by a microwave-assisted powder metallurgy route. The Si3N4 concentration was fixed at (5 wt.%) in Al-Si3N4-GNPs composites while the GNPs concentration was varied between (0 wt.%) to (1.5 wt.%) with an increment of (0.5 wt.%). The structural analysis indicates the formation of phase pure materials with high crystallinity. The microstructural analysis confirmed the presence of the Si3N4 and GNPs showing enhanced agglomeration with the increasing amount of GNPs. Moreover, the surface roughness of the synthesized composites increases with an increasing amount of GNPs reaching its maximum value (RMS = 65.32 nm) at 1.5 wt.% of GNPs. The Al-Si3N4-GNPs composites exhibit improved microhardness and promising load-indentation behavior during nanoindentation when compared to pure aluminum (Al). Moreover, Al-Si3N4-GNPs composites demonstrate higher values of compressive yield strength (CYS) and ultimate compressive strength (UCS) when compared to pure Al despite showing a declining trend with an increasing amount of GNPs in the matrix. Finally, a shear mode of fracture is prevalent in Al-Si3N4-GNPs composites under compression loading.

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Section: Resultssupporting

confidence: 92%

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

et al. 2021

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“…The use of different sizes of filler particle enables (i.e., low content of nanofillers and high content of micro fillers) improved properties by uniform dispersion and reduced interparticle spacing of filler particles. Zirconia has the ability to absorb a great amount of stress relative to other ceramic materials and possesses excellent wear, chemical, and corrosion resistance [23,24]. All these used filler particles exhibit strong ionic interatomic bonding to confer favorable mechanical and corrosion properties of the developed composite.…”

Section: Methodsmentioning

confidence: 99%

“…The reinforcement of graphite in the Al matrix was found to increase the corrosion rate [11,22]. Adding ZrO 2 with SiC to form Al/SiC/ZrO 2 hybrid composites has been found to considerably improve the mechanical properties, tribological, chemical and corrosion resistance [23,24].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and corrosion behavior of SiC/Graphite/ZrO₂hybrid reinforced aluminum-based composites for marine environment

Yadav

Gangwar

Yadav

et al. 2021

Surf. Topogr.: Metrol. Prop.

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Marine conditions are highly contentious for most materials manifested by the decayed condition of old ships and wrecks (made up of steel/wood). This work investigates the mechanical and corrosion behavior of aluminum-based composites reinforced with 3, 6, and 9 wt% of hybrid reinforcements (SiC, graphite, and ZrO2). It was observed that 3 wt% reinforcement composite had the optimum mechanical properties along with minimum corrosion rate. This composition had the least void contents, and its micro-hardness increased by 27.5% (42.6 VHN) in comparison to that of the unreinforced Al (33.3 VHN). Impact strength of the composite increased by 27.2% for 6 wt% hybrid reinforcement (247.1 J) and then started decreasing, whereas tensile strength of the composite increased by 8% for 9 wt% hybrid reinforcement (124.0 MPa) with respect to that of pure Al. The flexural strength of the pure Al reduced with the addition of hard reinforcing particles. The corrosion behavior of the composite was analyzed in 3.5% NaCl solution (simulating the seawater condition) at room temperature with the help of Tafel polarization curve and scanning electron microscopy (SEM) micrographs. It revealed that the 3% reinforced composite had the minimum corrosion current density (0.4 μA) and corrosion rate (0.23 mpy) compared to those of pure Al. The surface morphology of corrosion tested samples indicated the pitting corrosion mechanism.

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“…19 Here the possibility of air inhalation during the microwave sintering process is eliminated, due to which the solidity of the material increases. [20][21][22] The good solidity of the material helps to enhance the properties of the composite such as compressive strength, hardness, and tensile strength.…”

Section: Materials Testing and Equipmentmentioning

confidence: 99%

Effect of microwave sintering on the microstructure and mechanical properties of Al-Al₂O₃-Si₃N₄ hybrid composite fabricated by powder metallurgy techniques

Dwivedi¹

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present investigation, Si3N4 has been used in the partial replacement of SiC with Al/Al2O3 composite for the application in the automobile industries parts. A microwave sintering technique was employed for the processing of the composite. The aluminum-based composite was developed with the constant 5 wt.% of Al2O3. The weight percent of Si3N4 increased from 2.5% to 7.5%. Uniform distribution of the reinforcement particles was observed for the composition Al-5 wt.% Al2O3 − 2.5 wt.% Si3N4 composite and Al-5 wt.% Al2O3 − 5 wt.% Si3N4 composite. Optical microscope images Al-5 wt.% Al2O3 − 5 wt.% Si3N4 composite showed that the dispersion of the reinforcement (Al2O3 and Si3N4) has been done in a very fine and dense manner. Dispersion of reinforcement in a very dense manner helped in enhancing the mechanical properties of the composite. EDX pattern of Al-5 wt.% Al2O3 − 5 wt.% Si3N4 composite showed the maximum weight percentage of an element of Al, followed by Si, O, and N. Minimum porosity was found to be 0.045% for the composition Al-5 wt.% Al2O3 − 2.5 wt.% Si3N4. However, the percent porosity of the Al-5 wt.% Al2O3 − 5 wt.% Si3N4 was 0.072%. The hardness, compressive strength, and tensile strength of aluminum were improved by about 82.85%, 18.94%, and 62.60% respectively with respect to aluminum after adding 5 wt.% Al2O3 and 5 wt.% Si3N4. XRD of the Al/Al2O3/Si3N4 composite showed the presence of Al, Al2O3, Si3N4, MgAl2O4, and Al2Cu phases. Thermal expansion and corrosion behavior were also observed to identify the Al2O3 and Si3N4 addition effect in the aluminum alloy.

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Structural and Mechanical Properties of Al-SiC-ZrO2 Nanocomposites Fabricated by Microwave Sintering Technique

Cited by 28 publications

References 44 publications

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

Mechanical and corrosion behavior of SiC/Graphite/ZrO₂hybrid reinforced aluminum-based composites for marine environment

Effect of microwave sintering on the microstructure and mechanical properties of Al-Al₂O₃-Si₃N₄ hybrid composite fabricated by powder metallurgy techniques

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Structural and Mechanical Properties of Al-SiC-ZrO2 Nanocomposites Fabricated by Microwave Sintering Technique

Cited by 28 publications

References 44 publications

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

Effect of Silicon Nitride and Graphene Nanoplatelets on the Properties of Aluminum Metal Matrix Composites

Mechanical and corrosion behavior of SiC/Graphite/ZrO2hybrid reinforced aluminum-based composites for marine environment

Effect of microwave sintering on the microstructure and mechanical properties of Al-Al2O3-Si3N4 hybrid composite fabricated by powder metallurgy techniques

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Mechanical and corrosion behavior of SiC/Graphite/ZrO₂hybrid reinforced aluminum-based composites for marine environment

Effect of microwave sintering on the microstructure and mechanical properties of Al-Al₂O₃-Si₃N₄ hybrid composite fabricated by powder metallurgy techniques