Investigation of the Effectuation of Graphene Nanosheets (GNS) Addition on the Mechanical Properties and Microstructure of S390 HSS Using Powder Metallurgy Method

Zidan, H. M.; Hegazy, M.M.; Abd-El-Wahed, Anwar Mahmoud; Yehia, Hossam M.; Kady, Omayma A. El

doi:10.21608/ijmti.2021.181121

Cited by 9 publications

(5 citation statements)

References 13 publications

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“…Then, the treated reinforcements were coated with 5 wt. % nano-Ag by the electroless plating process [ 20 , 21 , 22 , 23 , 24 , 25 ]. Silver nitrate was dissolved (3 gm) in 1 L of distilled water, and the pH of the solution was adjusted to 11; then, the reinforcement powder was added.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of Physical Properties and Corrosion Resistance of Al-Cu-Al2O3/Graphene Nanocomposites by Powder Metallurgy Technique

Elkady¹,

Yehia

Nouh

et al. 2022

Materials

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In this study, we enhanced the adhesion of graphene nanosheets to achieve homogeneous dispersion, consequently improving the electrical and thermal conductivity, coefficient of thermal expansion, and corrosion resistance with an aluminum matrix containing up to 1.5 wt. % graphene. First, 2.5 wt. % Al2O3 and varying ratios of graphene up to 1.5 wt. % were coated with 5 wt. % silver nanoparticles to metalize their surfaces. Predetermined portions of coated alumina and graphene were mixed with Al/10 wt. % Cu powder for 45 h. Mixed samples were compacted under 600 MPa and sintered at 565 °C in a vacuum furnace for 60 min with a low heating rate of 2 °C/min. The strengthening effect of the added materials on the density, microstructure, electrical and thermal conductivities, thermal expansion, and corrosion behavior of aluminum were investigated. Excellent adhesion and homogeneous dispersion of the investigated reinforcements were achieved. Three phenomena were observed: (1) an improvement in the densification, electrical and thermal conductivity, thermal expansion, and corrosion rate by adding 10 wt. % Cu to the aluminum matrix; (2) deterioration of the properties of Al/10 wt. % Cu with the addition of 2.5 wt. % alumina nanoparticles; and (3) improved properties with the addition of graphene nanosheets up to 1 wt. % and a decrease in property values beyond 1.5 wt. % graphene content due to the formation of agglomerations and pores in the metal matrix.

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Section: Methodsmentioning

confidence: 99%

Enhancement of Physical Properties and Corrosion Resistance of Al-Cu-Al2O3/Graphene Nanocomposites by Powder Metallurgy Technique

Elkady¹,

Yehia

Nouh

et al. 2022

Materials

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“…Hot pressing is the setup in uniaxial hot pressing that is very similar to conventional PM pressing, except that heat is applied during compaction. The product is generally dense, intense, challenging, and dimensionally accurate [29][30][31][32][33][34][35][36]. Despite these advantages, the process presents some technical issues that limit its adoption.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Aluminum Nano-Composites Reinforced with Nano-Copper and High Graphene Ratios Using Hot Pressing Technique

Yehia,

Elmetwally,

Elhabak

et al. 2023

Materials

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In this study, the nano-aluminum powder was reinforced with a hybrid of copper and graphene nanoplatelets (GNPs). The ratios of GNPs were 0 wt%, 0.4 wt%, 0.6 wt%, 1.2 wt% and 1.8 wt%. To avoid the reaction between aluminum and graphene and, consequently, the formation of aluminum carbide, the GNP was first metalized with 5 wt% Ag and then coated with the predetermined 15 wt% Cu by the electroless coating process. In addition, the coating process was performed to improve the poor wettability between metal and ceramic. The Al/(GNPs-Ag)Cu nanocomposites with a high relative density of 99.9% were successfully prepared by the powder hot-pressing techniques. The effects of (GNPs/Ag) and Cu on the microstructure, density, hardness, and compressive strength of the Al-Cu nanocomposite were studied. As a result of agitating the GNPs during the cleaning and silver and Cu-plating, a homogeneous distribution was achieved. Some layers formed nano-tubes. The Al4C3 phase was not detected due to coating GNPs with Cu. The Cu9Al4 intermetallic was formed during the sintering process. The homogeneous dispersion of Cu and different ratios of GNs, good adhesion, and the formation of the new Cu9Al4 intermetallic improved in hardness. The pure aluminum sample recorded 216.2 HV, whereas Al/Cu reinforced with 1.8 GNs recorded 328.42 HV with a 51.9% increment. The compressive stress of graphene samples was improved upon increasing the GNPs contents. The Al-Cu/1.8 GNs sample recorded 266.99 MPa.

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“…It is lightweight (2.2 g/cm 3 ), challenging to distribute homogeneously in molten aluminum, and can easily float to the surface. The powder metallurgy technique is one of the best techniques suggested to solve this problem, [16][17][18][19][20] as it can easily mix lightweight materials with heavier ones. The production of lightweight composites is not the only obstacle.…”

Section: Introductionmentioning

confidence: 99%

“…An increase in the hardness and wear resistance by increasing the graphene content was observed. 16 Alumina has excellent mechanical properties making it stand out from many comparable materials by delivering equal or better solutions for low-cost production and manufacturing. 17 The mechanical performance of the A356 aluminum alloy reinforced with 0.75, 1.5, 2.5, 3.5, and 5 vol% Al 2 O 3 by the mechanical stirrer casting was investigated.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous dispersion and mechanical performance of aluminum reinforced with high graphene content

Yehia

Nouh

Elkady

et al. 2022

Journal of Composite Materials

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In this research, trials were performed to improve the mechanical properties of pure aluminum, maintain its lightweight, and enhance the distribution of graphene with high content up to 1.5 wt%. Aluminum composites reinforced with 10% copper, 2.5% alumina, and different ratios of graphene up to 1.5% were manufactured by powder metallurgy followed by hot rolling. The suitable sintering conditions were 565°C for 60 min under a vacuum atmosphere. The powder metallurgy method showed a general improvement in aluminum’s microstructure. An excellent distribution of the different reinforcements was achieved up to 1.5 wt% GNs due to the long mixing time in the hexane solution. However, some aggregations of the GNs layers were observed at 1.5 GNs percent. The mapping analysis detected the nano-alumina distribution. The 1 wt% GNs sample exhibit the greatest improvement in hardness with 2.4 times and yield strength increment with 76% compared to pure aluminum. Also, the wear rate decreased significantly at 1 wt% GNs percent. By conducting the hot rolling process, all results exceeded their counterparts by the powder metallurgy method up to 1.5% GNS content. The accumulated GNs at 1.5 GNs percent were spread due to slipping them over each other as a result of the rolling process. Eliminating the internal pores and improving the distribution of graphene in that sample improved its hardness, yield resistance, and mechanical wear. After the rolling process, the hardness at 1.5 wt% GNs increased from 218 HV to 389 HV, and the yield strength from 203 MPa to 280 MPa.

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Investigation of the Effectuation of Graphene Nanosheets (GNS) Addition on the Mechanical Properties and Microstructure of S390 HSS Using Powder Metallurgy Method

Cited by 9 publications

References 13 publications

Enhancement of Physical Properties and Corrosion Resistance of Al-Cu-Al2O3/Graphene Nanocomposites by Powder Metallurgy Technique

Enhancement of Physical Properties and Corrosion Resistance of Al-Cu-Al2O3/Graphene Nanocomposites by Powder Metallurgy Technique

Manufacturing of Aluminum Nano-Composites Reinforced with Nano-Copper and High Graphene Ratios Using Hot Pressing Technique

Homogeneous dispersion and mechanical performance of aluminum reinforced with high graphene content

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