Effect of reinforcement concentration on the properties of hot extruded Al-Al2O3 composites synthesized through microwave sintering process

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

doi:10.1016/j.msea.2017.04.064

Cited by 114 publications

(43 citation statements)

References 45 publications

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“…As seen from Table 2, the porosity values are also found to be increasing with increasing density and the Mg-1.5 vol % Sm 2 O 3 nanocomposite exhibited highest porosity value. The low wettability, agglomeration rate, and pore nucleation at the Mg-Sm 2 O 3 interface could be the main reasons behind the increase in porosity with the increase in vol % of Sm 2 O 3 NPs in Mg [27]. Further, no observed macrostructural defects were observed on sintered samples and extruded rods, demonstrating the efficiency of hybrid microwave sintering and hot extrusion to synthesize near-dense magnesium-based nanocomposites [28].…”

Section: Densitymentioning

confidence: 90%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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Abstract:The present study reports the development of Mg-Sm 2 O 3 nanocomposites as light-weight materials for weight critical applications targeted to reduce CO 2 emissions, particularly in the transportation sector. Mg-0.5, 1.0, and 1.5 vol % Sm 2 O 3 nanocomposites are synthesized using a powder metallurgy method incorporating hybrid microwave sintering and hot extrusion. The microstructural studies showed dispersed Sm 2 O 3 nanoparticles (NPs), refinement of grain size due to the presence of Sm 2 O 3 NPs, and presence of limited porosity. Microhardness and dimensional stability of pure Mg increased with the progressive addition of Sm 2 O 3 NPs. The addition of 1.5 vol % of Sm 2 O 3 NPs to the Mg matrix enhanced the ignition temperature by~69 • C. The ability of pure Mg to absorb vibration also progressively enhanced with the addition of Sm 2 O 3 NPs. The room temperature compressive strengths (CYS and UCS) of Mg-Sm 2 O 3 nanocomposites were found to be higher without having any adverse effect on ductility, leading to a significant increase in energy absorbed prior to compressive failure. Further, microstructural characteristics are correlated with the enhancement of various properties exhibited by nanocomposites.

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Section: Densitymentioning

confidence: 90%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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“…By increasing the relative density, porosity decreases and thus the strength enhances dramatically. So, the first effect is due to the increase in the density of the nanocomposites [54].…”

Section: The Main Affecting Factors On Strengthening Of Hybrid Nanocomentioning

confidence: 99%

Synthesis of WS₂/CNT hybrid nanoparticles for fabrication of hybrid aluminum matrix nanocomposite

Vaziri

Shokuhfar

Afghahi

2020

Mater. Res. Express

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In this study, a simple, safe and cost-effective method was developed for fabricating the tungsten disulfide/carbon nanotube (WS 2 /CNT) hybrid nanoparticles via chemical vapor deposition (CVD) process. Hybrid nanoparticles used for reinforcing the aluminum matrix. The hybrid nanocomposites were prepared by powder metallurgy processing and consolidated by the Hot-Pressing process. The chemical composition and morphology of the WS 2 /CNT hybrid particles were studied by x-ray diffraction (XRD), filed emission scanning electron microscopy (FESEM), Raman spectra, Fouriertransform infrared spectroscopy (FTIR) and thermo gravimetric analysis (TGA). The results proved that the uniform, pure and tubular WS 2 / CNT hybrid nanoparticles were produced and WS 2 nanoparticles were decorated the CNT surface successfully. Optical microscopy (OM) and FESEM used for characterization of the microstructure of hybrid nanocomposite, indicate a good distribution of hybrid nanoparticles in the aluminum matrix. Maximum values of relative density, hardness and compressive strength were measured for sample with WS 2 /CNT ratio of 1:1. A relative density of more than 99.5% was obtained for this sample. Hardness and compressive strength were improved by 43% and 60% compared with pure aluminum respectively.

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“…Theoretical density was calculated based on those of a-Al 2 O 3 (3.987 g/cm 3 ) and a-Ti (4.506 g/cm 3 ) by assuming rule of mixture of constituent phases. Bulk density increased with increasing Ti content, indicating that the addition of Ti and the existence of tertiary phases such as Ti-O (5.82 g/cm 3 23 It is, however, hard to determine the precise quantitative contents of these reaction product phases (Ti-O and TiAl 2 O 5 ). Therefore, in this study, theoretical densities were calculated only based on those of pure Al 2 O 3 and Ti as mentioned before.…”

Section: Microstructure and Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Al 2 O 3 ceramics are widely used in the aerospace, electronics, and chemical industries along with other fields because of their high bending strength, good wear behavior, hightemperature resistance, good chemical stability, and relatively low production cost. [1][2][3] However, the application of Al 2 O 3 ceramics as structural components is limited by their brittleness, which is attributed to low fracture toughness. 4,5 Investigations on ceramic/metal nanocomposites have revealed that dispersing nanosized metals into a ceramic matrix can prevent crack propagation caused by plastic deformation, thereby increasing fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

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Fine Ti‐dispersed Al₂O₃ composites and their mechanical and electrical properties

et al. 2018

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Al2O3/Ti composites containing 0‐30 vol% dispersed fine Ti particles were fabricated using a hot‐press sintering method at 1500°C from mixtures of Al2O3 and TiH2 powders. During sintering, TiH2 decomposed to form metallic Ti. The effects of the Ti content on the mechanical and electrical properties of the composites were then investigated. No Ti‐Al intermetallic compounds were detected by X‐ray diffraction, and energy‐dispersive X‐ray spectroscopy indicated the presence of Al‐Ti‐O solid solution and Ti‐O phases. The composites showed enhanced densification; the measured densities were higher than the calculated theoretical values. Microstructural observation revealed homogeneously distributed fine Ti particles dispersed in the Al2O3 matrix. The Ti particle size ranged from submicrometer to a few micrometers depending on the Ti content. The fracture mode of the composites was primarily transgranular, in contrast to the intergranular fracture mode of monolithic Al2O3. Although the flexural strength was decreased with increase in Ti content, the composite containing 20 vol% Ti displayed the maximum fracture toughness of 4.3 MPa·cm1/2, which was 37% greater than that of monolithic Al2O3. The composites containing more than 15 vol% Ti exhibited drastic decreases in resistivity (~10−1 Ωcm), which were attributed to the formation of interconnected Ti networks at these Ti contents. The percolation threshold volume for electrical conduction in the present system was calculated to be 13.8 vol%. The results indicate that dispersing fine Ti particles into Al2O3 increased the fracture toughness and improved the conductivity of Al2O3.

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Effect of reinforcement concentration on the properties of hot extruded Al-Al2O3 composites synthesized through microwave sintering process

Cited by 114 publications

References 45 publications

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Synthesis of WS₂/CNT hybrid nanoparticles for fabrication of hybrid aluminum matrix nanocomposite

Fine Ti‐dispersed Al₂O₃ composites and their mechanical and electrical properties

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Effect of reinforcement concentration on the properties of hot extruded Al-Al2O3 composites synthesized through microwave sintering process

Cited by 114 publications

References 45 publications

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Synthesis of WS2/CNT hybrid nanoparticles for fabrication of hybrid aluminum matrix nanocomposite

Fine Ti‐dispersed Al2O3 composites and their mechanical and electrical properties

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Product

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Synthesis of WS₂/CNT hybrid nanoparticles for fabrication of hybrid aluminum matrix nanocomposite

Fine Ti‐dispersed Al₂O₃ composites and their mechanical and electrical properties