The effect of Cu coated Al2O3 particle content and densification methods on the microstructure and mechanical properties of Al matrix composites

Barakat, Waheed S.; Habba, Mohamed I.A.; Ibrahim, Abdul Razak; Fathy, A.; Elkady, Omayma A.

doi:10.1016/j.jmrt.2023.05.010

Cited by 42 publications

(6 citation statements)

References 45 publications

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“…A.M.I. abu-oqail et al [2,29,59,60]. Also, present analogous findings, emphasizing that the load's impact on the specimen mirrors the indentation response.…”

Section: Tribological Of the Al-cnts/h-bn Hybrid Nanocompositessupporting

confidence: 70%

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

Barakat,

Samir,

Elkady

et al. 2024

Preprint

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Ball bearings face numerous challenges under harsh operating conditions of elevated pressure between the balls and other contacting parts of the bearing like drop in tribological properties. To address these challenges, a new attempt was successfully made for the first time in this paper through an experimental investigation by the impact of incorporating hexagonal boron nitride (h-BN) into Aluminum-Carbon nanotubes (Al-0.6 wt. % CNTs) nanocomposites by an innovative coated with silver (Ag) and nickel (Ni) using a novel electroless chemical deposition technique, to improve the wettability and scattering between matrix and reinforcement. Various h-BN ratios (2, 4, 6, 8 and 10 wt. %) are incorporated and consolidated through high-energy ball milling and hot compaction techniques. The produced samples were tested and analyzed physically, mechanically, tribologically, and microstructurally. X-ray diffraction (XRD) and scanning electron microscope (SEM) analyses were used to explore the new morphologies and structures. The study delves into density, hardness, and wear resistance. The optimal h-BN content is determined to be 8 wt.%, enhancing wettability and dispersion within the Al-CNTs matrix. Thus, the properties of hardness, compressive strength, wear rate, and COF at 8 wt.% of h-BN content were enhanced by 105%, 60%, 74.5%, and 78.5%, respectively, compared to pure Al. This is due to the uniform scattering of h-BN nanoparticles across the entire surface, despite a significant decrease in relative density. In conclusion, the combination of high-energy ball milling, electroless deposition, and hot compaction techniques proves to be effective in producing Al-CNTs/h-BN nanocomposites coated with Ag and Ni nanoparticles.

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“…A.M.I. abu-oqail et al [2,29,59,60]. Also, present analogous findings, emphasizing that the load's impact on the specimen mirrors the indentation response.…”

Section: Tribological Of the Al-cnts/h-bn Hybrid Nanocompositessupporting

confidence: 70%

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

Barakat,

Samir,

Elkady

et al. 2024

Preprint

Self Cite

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“…Furthermore, extending milling times and a higher fraction of milled powders result in an elevated content of zirconia within the material. The incorporation of zirconia particles in situ may exert an discernible influence on enhancing the hardness of the material, as zirconia is inherently harder than titanium [71] potentially impeding dislocation movement during indentation [72]. The formation of this double peak is more notorious in samples with higher porosity.…”

Section: Microstructural and Mechanical Characterization Of Sintered ...mentioning

confidence: 99%

Understanding the Synergetic Effects of Mechanical Milling and Hot Pressing on Bimodal Microstructure and Tribo-Mechanical Behavior in Porous Ti Structures

Chávez-Vásconez,

Arévalo,

Torres

et al. 2023

Preprint

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“…Further, it was observed that such variations tend to tune the final composite properties and provide the designer with innumerable options to come up with a material which suits the targeted application [4][5][6]. Amongst the innumerable types of reinforcement, ceramic reinforcements, in both micro and nano scales, have attracted the highest interest [7]. MMCs, due to the merging of the properties of the base alloy and the ceramic reinforcements, possess a superior combination of properties such as ductility coupled with improved toughness and reduced weight with high strength [8].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Thermal Properties of LM13- Quartz- Fly-Ash Hybrid Composites

Murthy,

Ambekar,

Hiremath

2024

J. Compos. Sci.

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In the present work, a metal–matrix composite was casted using the LM13 aluminum alloy, which is most widely used for casting automotive components. Such applications require materials to withstand high operating temperatures and perform reliably without compromising their properties. In this regard, particulate-reinforced composites have gained widespread adaptability. The particulate reinforcements used comprise of one of the widely available industrial by-products. which is fly ash, along with the abundantly available quartz. Hybrid composites are fabricated through the economical liquid route that is widely used in mass production. Though there are numerous published research articles investigating the mechanical properties of metal–matrix composites, very few investigated the thermal properties of the composites. In the present work, thermal properties such as thermal conductivity and thermal diffusivity of cast hybrid composites were evaluated. The particulate reinforcements were added in varied weight percentages to the molten LM13 alloy and were dispersed uniformly using a power-driven stirrer. The melt with the dispersed particulate reinforcements was then poured into a thoroughly dried sand mold, and the melt was allowed to solidify. The quality of the castings was ascertained through density evaluation followed by a microstructural examination. It was found that the composites with only the fly ash particles as a reinforcement were less dense in comparison to the composites cast with the quartz particulate reinforcement. However, the hybrid composite, with both particulate reinforcements were dense. The microstructure revealed a refined grain structure. The thermal diffusivity and thermal conductivity values were lower for the composites cast with only the fly ash reinforcement. On the other hand, the composites cast with only quartz as the particulate reinforcement exhibited higher thermal diffusivity and thermal conductivity. The specific heat capacity was found to be lower for the fly ash-reinforced composites and higher for the quartz-reinforced composites in comparison to the LM13 base matrix alloy. However, the highest value of thermal diffusivity and thermal conductivity were reported for the hybrid composites with a 10 wt.% inclusion of both fly ash and quartz particulate reinforcements.

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The effect of Cu coated Al2O3 particle content and densification methods on the microstructure and mechanical properties of Al matrix composites

Cited by 42 publications

References 45 publications

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

Enhancement of microstructural, mechanical and tribological properties of hybrid Al- CNTs through electroless deposition of innovative h-BNs contents coated Ag and Ni for purpose of ball bearing

Understanding the Synergetic Effects of Mechanical Milling and Hot Pressing on Bimodal Microstructure and Tribo-Mechanical Behavior in Porous Ti Structures

An Investigation of the Thermal Properties of LM13- Quartz- Fly-Ash Hybrid Composites

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