Compressive strength and thermal properties of spark plasma sintered Al-Al2O3 nanocomposite

Saheb, Nouari; Shahzeb, Muhammad Khan

doi:10.2298/sos1801001s

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…The solid solubility is attributed to the constant fracture and cold welding, where the latter minimizes the distance of atomic diffusion between the layers formed by both components. Besides, it is attributed to the high temperatures generated locally during the impacts between the balls and dust ( ≈ 400 ºC) [13,[20][21][22][23]. Figure 3b shows that the crystal size decreases, while the internal strain increases, as a function of milling time attributed to the lattice distortion.…”

Section: Al-10mg Mechanical Alloyingmentioning

confidence: 99%

Microstructure and microhardness of the Al-10Mg alloy processed by the mechanical alloying technique

et al. 2020

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In this work, the Al-10Mg nanostructured alloy was synthesized by high-energy mechanical milling. Subsequently, the powders consolidated under a uniaxial pressing in the air. The as milled powders were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). SEM and XRD also characterized the sintered samples. Vickers microhardness of sintered Al-10Mg alloy was measured. SEM, XRD, and TEM characterizations show that the Al-10Mg alloy was synthesized after 10 h milling. The X-ray powder analysis of the structural parameters showed the increment with the time of the lattice parameter, strain as well as the solubility of Mg in Al. Besides, XRD and TEM studies showed that the crystallite size was reaching an average value of 19 nm after 10 h milling. XRD patterns of the all sintered specimens show the formation of the MgAl2O4 spinel phase. After powders compaction, the specimen sintered at 420?C for 2 h shows microhardness of 125 HV.

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Section: Al-10mg Mechanical Alloyingmentioning

confidence: 99%

Microstructure and microhardness of the Al-10Mg alloy processed by the mechanical alloying technique

et al. 2020

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“…The metal matrix's reinforcing materials can be ceramic particles or fibers that offer high mechanical strength and high modulus of elasticity, properties that make them optimal materials in various technological applications [9]. The most commonly reinforcement materials are, SiO 2 [10], Al 2 O 3 [11], Y 2 O 3 [12], ZrO 2 [13], TiC [14], B 4 C [15], SiC [16], Si 3 N 4 [17], graphene [18], fullerenes [19], and carbon nanotubes (CNTs) [20].…”

Section: Introductionmentioning

confidence: 99%

Powder metallurgy and hardness of the Ll-10Mg alloy reinforced with carbon nanotubes

et al. 2022

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In this work, the multi-walled carbon nanotubes (MWCNTs) were purified with an acid treatment and subsequently dispersed using ultrasound and a nonionic surfactant solution of ethoxylated lauric alcohol 7 moles of ethylene oxide (E7E). Then, carbon nanotubes (CNTs) were used as a reinforcement phase (0.4 wt.% and 0.8 wt.%) in the Al- 10Mg alloy. The high-energy ball milling was employed for the nanocomposites processing, and the resulting powders consolidate by uniaxial pressure. Measurements of Vickers microhardness, nanohardness, displacement, and Young's modulus were carried out on the compacts. The samples were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FT-IR), and Raman spectroscopy (RS). Good dispersion of MWCNTs was achieved using 0.5 mg/ml of the E7E surfactant. The CNTs were dispersed in the Al-10Mg matrix using 0.25 h of milling. After powders compaction, the Al-10Mg/0.4MWCNTs nanocomposite presented a microhardness of 190 HV, nanohardness of 3.5 GPa, and Young's modulus 116 GPa.

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“…There are many techniques for solid-state producing of aluminum alloys such as equal channel angular pressing (ECAP), powder metallurgy, extrusion and rolling [6][7][8]. The powder metallurgy technique provides high homogeneity, and dimensional accuracy, particle size control, and gas controlling [9].…”

Section: Introductionmentioning

confidence: 99%

From metal chips to composite: Effect of age-hardening on mechanical and wear properties of Al2O3 reinforced AA7075 composites

et al. 2020

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Aluminum metal matrix composites were used in various fields such as aircraft, underwater, automobile, aerospace. Several fabrication techniques were used for the production of these composites. Among the various methods, the powder metallurgy route provides dimensional accuracy and high production rates. In this paper, metal matrix composites that include 7075 aluminum alloy chips and Al2O3 particles were produced by using a hot pressing. The effect of reinforcement amount and T6 heat treatment on the mechanical and wear properties of the composites were investigated. Al2O3 particles were added by weight of 5, 10 and 15 % and the composites were produced by hot pressing. T6 heat treatment consisted of a solution treatment at 480?C for 2 h and artificially aging process at 120?C for 24 h. Wear resistance of the composites was determined by a ball-on-disc dry sliding wear test. Brinell Hardness of the composites tended to increase with the increasing Al2O3 reinforcement up to 10 wt.% and with T6 treating. Particle reinforcement improved the wear resistance up to 10 wt.% Al2O3. In addition, volumetric material loss tended to decrease after the aging process.

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Compressive strength and thermal properties of spark plasma sintered Al-Al2O3 nanocomposite

Cited by 8 publications

References 38 publications

Microstructure and microhardness of the Al-10Mg alloy processed by the mechanical alloying technique

Microstructure and microhardness of the Al-10Mg alloy processed by the mechanical alloying technique

Powder metallurgy and hardness of the Ll-10Mg alloy reinforced with carbon nanotubes

From metal chips to composite: Effect of age-hardening on mechanical and wear properties of Al2O3 reinforced AA7075 composites

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