Enhanced performance of nano-sized SiC reinforced Al metal matrix nanocomposites synthesized through microwave sintering and hot extrusion techniques

Reddy, M. Penchal; Shakoor, Abdul; Parande, Gururaj; Manakari, Vyasaraj; Ubaid, Fareeha; Mohamed, A.M.A.; Gupta, Manoj

doi:10.1016/j.pnsc.2017.08.015

Cited by 153 publications

(49 citation statements)

References 30 publications

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“…The compacted cylindrical pellets were sintered in a microwave sintering furnace at 550 • C with a heating rate of 10 • C/min for 30 min. The compacted pellets were placed at the center of the cavity and sintering was performed inside the multimode cavity [22]. The schematic of the experimental procedure is presented in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

et al. 2019

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The present study focuses on the synthesis and characterization of amorphous silicon nitride (Si3N4) reinforced aluminum matrix nanocomposites through the microwave sintering process. The effect of Si3N4 (0, 1, 2 and 3 wt.%) nanoparticles addition to the microstructure and mechanical properties of the Al-Si3N4 nanocomposites were investigated. The density of Al-Si3N4 nanocomposites increased with increased Si3N4 content, while porosity decreased. X-ray diffraction (XRD) analysis reveals the presence of Si3N4 nanoparticles in Al matrix. Microstructural investigation of the nanocomposites shows the uniform distribution of Si3N4 nanoparticles in the aluminum matrix. Mechanical properties of the composites were found to increase with an increasing volume fraction of amorphous Si3N4 reinforcement particles. Al-Si3N4 nanocomposites exhibits higher hardness, yield strength and enhanced compressive performance than the pure Al matrix. A maximum increase of approximately 72% and 37% in ultimate compressive strength and 0.2% yield strength are achieved. Among the synthesized nanocomposites, Al-3wt.% Si3N4 nanocomposites displayed the maximum hardness (77 ± 2 Hv) and compressive strength (364 ± 2 MPa) with minimum porosity level of 1.1%.

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Section: Methodsmentioning

confidence: 99%

Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

et al. 2019

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“…In AMMCs, the most common types of reinforcement that can be used are SiC, Si 3 N 4 , Y 2 O 3 , TiC, and Al 2 O 3 [19][20][21][22][23]. Among these ceramics, Y 2 O 3 was selected as the reinforcement to be used in this study due to its high strength, hardness, melting point, and thermal conductivity [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Compressive Behavior of Al–Y2O3 Nanocomposites Prepared by Microwave-Assisted Mechanical Alloying

Mattli

Shakoor

Reddy

et al. 2019

Metals

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In this study, Al-Y 2 O 3 nanocomposites were synthesized via mechanical alloying and microwave-assisted sintering. The effect of different levels of yttrium oxide on the microstructural and mechanical properties of the Al-Y 2 O 3 nanocomposites were investigated. The density of the Al-Y 2 O 3 nanocomposites increased with increasing Y 2 O 3 volume fraction in the aluminum matrix, while the porosity decreased. Scanning electron microscopy analysis of the nanocomposites showed the homogeneous distribution of the Y 2 O 3 nanoparticles in the aluminum matrix. X-ray diffraction analysis revealed the presence of yttria particles in the Al matrix. The mechanical properties of the Al-Y 2 O 3 nanocomposites increased as the addition of yttria reached to 1.5 vol. % and thereafter decreased. The microhardness first increased from 38 Hv to 81 Hv, and then decreased to 74 ± 4 Hv for 1.5 vol. % yttria. The Al-1.5 vol. % Y 2 O 3 nanocomposite exhibited the best ultimate compressive strength and yielded a strength of 359 ± 7 and 111 ± 5 MPa, respectively. The Al-Y 2 O 3 nanocomposites showed higher hardness, yield strength, and compressive strength than the microwave-assisted mechanically alloyed pure Al.

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“…Reinforcing fibers/particles increases stiffness [25], improves mechanical and creep properties [19][20][21][22][23][24], and decreases the thermal expansion [26] of the composite. Nanocomposites with a reinforcing phase size of up to 100 nm have been intensively studied in the last decade [27][28][29][30][31]. Magnesium-alloy-based (nano)composites have been considered a material suitable for biomedical applications in the last few years [32].…”

Section: Introductionmentioning

confidence: 99%

Elastic and Plastic Behavior of the QE22 Magnesium Alloy Reinforced with Short Saffil Fibers and SiC Particles

Zapletal

Trojanová

Doležal

et al. 2018

Metals

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Magnesium alloy QE22 (nominal composition 2 wt % Ag, 2 wt % mixture of rare earth elements, balance Mg) was reinforced with 5 vol % Saffil fibers and 15 vol % SiC particles. The hybrid composite was prepared via the squeeze cast technique. The microstructure of the monolithic alloy and composite was analyzed using scanning electron microscopy. Elastic modulus was measured at room temperature and modeled by the Halpin-Tsai-Kardos mathematical model. The strengthening effect of fibers and particles was calculated and compared with the experimentally obtained values. The main strengthening terms were determined. Fracture surfaces were studied via scanning electron microscope. While the fracture of the matrix alloy had a mainly intercrystalline character, the failure of the hybrid composite was transcrystalline.Before the compression tests, the grip heads of the testing machine were lubricated with MoS 2 . For both tensile and compression tests, three samples were used. Mechanical tests were carried out at room temperature (23 ± 2 • C) in a Zwick Z250 PC controlled testing device () with a constant cross head speed of 1 mm·min −1 , giving the strain rate of 5.5 × 10 −4 s −1 (tension) and 1.4 × 10 −3 s −1 (compression). True stress-true plastic strain curves were computed. Characteristic tensile/compression yield stress (TYS/CYS) and ultimate tensile/compression strength (UTS/UCS) were estimated together with the strain-to-fracture, ε f . Metals 2018, 8, x FOR PEER REVIEW 3 of 13Germany) with a constant cross head speed of 1 mm⋅min −1 , giving the strain rate of 5.5 × 10 −4 s −1 (tension) and 1.4 × 10 −3 s −1 (compression). True stress-true plastic strain curves were computed. Characteristic tensile/compression yield stress (TYS/CYS) and ultimate tensile/compression strength (UTS/UCS) were estimated together with the strain-to-fracture, εf.

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Enhanced performance of nano-sized SiC reinforced Al metal matrix nanocomposites synthesized through microwave sintering and hot extrusion techniques

Cited by 153 publications

References 30 publications

Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

Microstructure and Compressive Behavior of Al–Y2O3 Nanocomposites Prepared by Microwave-Assisted Mechanical Alloying

Elastic and Plastic Behavior of the QE22 Magnesium Alloy Reinforced with Short Saffil Fibers and SiC Particles

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