Electrochemical Surface Modification of Aluminum Sheets Prepared by Powder Metallurgy and Casting Techniques for Printed Circuit Applications

Yehia, Hossam M.; Elkady, Omayma A.; Reda, Y.; Ashraf, Kaunain

doi:10.1007/s12666-018-1464-z

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…Lowering the CTE of the PM sheets makes it suitable for many thermal applications that require thermal stability of materials to keep the shape of the samples without any deformation affected by the thermal stresses during the working process. This finally leads to an increase in the lifetime of materials, which is pretty much valuable from an economic point of view [72]. ) of high entropy alloys were prepared by the powder metallurgy process at 900, 950, and 1000 • C for 90 min.…”

Section: Coefficient Of Thermal Expansion (Cte)mentioning

confidence: 99%

Effect of Copper Addition on the AlCoCrFeNi High Entropy Alloys Properties via the Electroless Plating and Powder Metallurgy Technique

et al. 2021

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To improve the AlCoCrFeNi high entropy alloys’ (HEAs’) toughness, it was coated with different amounts of Cu then fabricated by the powder metallurgy technique. Mechanical alloying of equiatomic AlCoCrFeNi HEAs for 25 h preceded the coating process. The established powder samples were sintered at different temperatures in a vacuum furnace. The HEAs samples sintered at 950˚C exhibit the highest relative density. The AlCoCrFeNi HEAs model sample was not successfully produced by the applied method due to the low melting point of aluminum. The Al element’s problem disappeared due to encapsulating it with a copper layer during the coating process. Because the atomic radius of the copper metal (0.1278 nm) is less than the atomic radius of the aluminum metal (0.1431 nm) and nearly equal to the rest of the other elements (Co, Cr, Fe, and Ni), the crystal size powder and fabricated samples decreased by increasing the content of the Cu wt%. On the other hand, the lattice strain increased. The microstructure revealed that the complete diffusion between the different elements to form high entropy alloy material was not achieved. A dramatic decrease in the produced samples’ hardness was observed where it decreased from 403 HV at 5 wt% Cu to 191 HV at 20 wt% Cu. On the contrary, the compressive strength increased from 400.034 MPa at 5 wt% Cu to 599.527 MPa at 15 wt% Cu with a 49.86% increment. This increment in the compressive strength may be due to precipitating the copper metal on the particles’ surface in the nano-size, reducing the dislocations’ motion, increasing the stiffness of produced materials. The formability and toughness of the fabricated materials improved by increasing the copper’s content. The thermal expansion has increased gradually by increasing the Cu wt%.

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Section: Coefficient Of Thermal Expansion (Cte)mentioning

confidence: 99%

Effect of Copper Addition on the AlCoCrFeNi High Entropy Alloys Properties via the Electroless Plating and Powder Metallurgy Technique

et al. 2021

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“…The CTE was measured by heating the samples from room temperature to 350 °C, using a system and technique described in details by Yahia et al [29]. from the SEM images that, the surface of hybrid CNT-rGO coated powder particles are slightly smoother than only rGO coated ones.…”

Section: Consolidation Of Compositesmentioning

confidence: 99%

Effect of Carbon Nanotube (CNT) Content on the Hardness, Wear Resistance and Thermal Expansion of In-Situ Reduced Graphene Oxide (rGO)-Reinforced Aluminum Matrix Composites

et al. 2019

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Aluminum matrix composites reinforced with reduced graphene oxide (rGO) and hybrid of carbon nanotube (CNT) and rGO are fabricated by solution coating powder metallurgy process. The hardness, wear resistance and coefficient of thermal expansion (CTE) of the reinforced aluminum composites and the associated microstructural changes with rGO range (0.2-0.6 wt. %) and hybrids of 0.2 wt. % CNT-rGO at different ratios have been investigated. The intensive microstructural observations show that rGO is adsorbed on Al particles and uniformly distributed in the Al matrix composites. The hardness values of the composites increase significantly with rGO reinforcement exhibiting the maximum hardness at 0.4 wt. % rGO. Compared with the hybrid composites CNT-rGO/Al counterparts fabricated by the same route and wt. percent of 0.2, the hardness values in the hybrid CNT-rGO increase considerably. Similar to the hardness, the results of wear tests also exhibit corresponding variation in the values of the wear rates. The improvement in the wear resistance of the hybrid CNT-rGO/Al composite is pronounced in this work. Whereas the rGO reinforcements decrease significantly the wear rate of the aluminum-base by 98%, the wear resistance of the corresponding hybrid CNT-rGO is significantly higher than that of the preceding composites. Maximum CTE reduction of 28% was recorded for hybrid CNT-rGO (1:1) reinforced composite.

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“…Generally, wetting and reaction between metals and ceramics is difficult so that the adhesion and the interfacial bonding between them are difficult to obtain. Researchers have tried to overcome these problems by using the electro-less coating process for ceramic powders to produce a wettability layer on the surface of it to facilitate the adhesion between the constituents of the composite [12,15].…”

Section: Introductionmentioning

confidence: 99%

Graphene Reinforced Copper Matrix Nano-Composite for Resistance Seam Welding Electrode

Mansour

Yehia

Ali

2021

The Bulletin Tabbin Institute for Metallurgical Studies (TIMS)

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Five samples contain 0, 1.2, 1.4, 1.6, and 1.8 wt. % graphene (GNs) were prepared by the powder metallurgy technique. The 20 (WC-TiC-Co) wt. %, 5wt. %Ni, and the different weight percentages of the graphene (GNs) were coated by copper by the electroless coating process. The effect of the GNs on the density, hardness, compressive strength, and thermal expansion was studied. The microstructure revealed an excellent distribution for the different reinforcements and good adhesion between them. The results indicate that the hardness and the compressive resistance were significantly improved. These improvements were attributed to the remarkable mechanical and physical properties of the GNs. The thermal expansion was decreased by increasing the GNs content.

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Electrochemical Surface Modification of Aluminum Sheets Prepared by Powder Metallurgy and Casting Techniques for Printed Circuit Applications

Cited by 12 publications

References 13 publications

Effect of Copper Addition on the AlCoCrFeNi High Entropy Alloys Properties via the Electroless Plating and Powder Metallurgy Technique

Effect of Copper Addition on the AlCoCrFeNi High Entropy Alloys Properties via the Electroless Plating and Powder Metallurgy Technique

Effect of Carbon Nanotube (CNT) Content on the Hardness, Wear Resistance and Thermal Expansion of In-Situ Reduced Graphene Oxide (rGO)-Reinforced Aluminum Matrix Composites

Graphene Reinforced Copper Matrix Nano-Composite for Resistance Seam Welding Electrode

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