The effect of silver (Ag) addition to mechanical and electrical properties of copper alloy (Cu) casting product

Felicia, Dian Mughni; Rochiem, Rochman; Laia, Standley M.

doi:10.1063/1.5030297

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…The alloy consists of α-and β-phase, where, α is a solid solution of Ag in Cu matrix and β is a solid solution of Cu in Ag matrix. Clusters or colonies (α), small, bright or light regions, appeared in optical micrographs for the base alloy (Cu-7Ag) represents Ag-rich areas exist within matrix Cu-rich areas in dark color; this is the same as stated in [4]. These colonies Ag-rich phases dissolved into the matrix after the homogenization treatment at 777 ℃, as shown in As noticed in Fig ( 4a) the microstructure of the sintered (Cu-7Ag+4vol.% Y2O3), no solid solution was formed between the base alloy and the added ceramic oxide, so the particles of (Y2O3) appeared clearly distinct from the color of the matrix and were distributed more uniform after the homogenization treatment and aging.…”

Section: Microstructuresupporting

confidence: 52%

“…Rosochowski and his coworkers in [3] used the severe deformation for grain refinement and enhancement of the properties. Felicia et.al in [4] studied silver's impact on cast copper alloys' hardness, strength, and electrical conductivity. Robinson et.al in [5] studied the effect of silver addition in copper-silver alloys fabricated by laser powder bed fusion in situ alloying.…”

Section: Introductionmentioning

confidence: 99%

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Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy

Raheem,

Al-Ethari,

Abbas

2024

J. Phys.: Conf. Ser.

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In this study, (Cu-7Ag) alloy was synthesized through powder metallurgy rout and explored the effect of adding yttrium oxide (Y2O3) with three different volume fractions 2, 4, and 6 vol.%. The effects were recorded on the electrical conductivity, the hardness, and the wear rate of the prepared samples. The base samples were sintered at 850 °C for 4 hours, while the composite samples were sintered with two holding times: at 550 °C for 2 hours and at 850°C for 4 hours. All of the sintered samples were homogenized at 777 °C for an hour followed by aging at 400 °C for 8 hours. The base alloy (Cu-7Ag alloy) showed higher conductivity but poor hardness and poor wear resistance. Best balance between the improvement of mechanical properties and suitable electrical conductivity had been obtained with Cu-7Ag+4vol.% Y2O3 composite sample.

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Section: Microstructuresupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy

Raheem,

Al-Ethari,

Abbas

2024

J. Phys.: Conf. Ser.

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“…It is known that alloying elements are the most important factors in increasing hardness and UTS values by preventing dislocation movement in materials. Felicia et al, in their study [49], stated that a remarkable increase in UTS and hardness values occurred with an increase in the Ag ratio in Cu–Ag alloys produced by the casting method. In another study, Bao et al [50] emphasised that UTS and hardness properties of Cu–Ag alloys can be improved due to solution hardening, interfacial quality and work-hardening due to the addition of Ag at different contents.…”

Section: Resultsmentioning

confidence: 99%

Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing

et al. 2022

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In this study, copper powders with dendritic morphology were produced by the electrolysis method, and then silver coating was applied to these powders by an electroless coating method. The bulk samples were fabricated by hot pressing method using different ratios of copper and silver-plated copper powders. The results showed that the electroless silver coating layer provided a strong bond at the particle boundaries of the samples, significantly improving the physical and mechanical properties of the materials. Accordingly, the hardness, tensile strength, electrical and thermal conductivity values of the samples produced from silver-plated dendritic copper particles were determined to be approximately 98 HB, 185 MPa, 102 IACS% and 402 W mK −1 , respectively. In addition, the oxidation resistance of the sample produced from completely silver-coated copper powders is 4 times higher than that of pure copper.

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“…The use of billon coins date from ancient Greece and continued through the Middle Ages, but are perhaps best known from the Roman Empire [7]. The addition of copper to silver was to increase its hardness and durability as silver is a very soft metal [8,9]. Surface corrosion products can occur, when Disclaimer/Publisher's Note: The statements, opinions, and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Excavated Silver Alloy (Billon) Coins from Amheida, Dakhla Oasis, Egypt

El-Gohary¹,

Rifai²,

Hussein³

2023

Preprint

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The importance of understanding the corrosion mechanisms of excavated metal artefacts help in determining the physico-chemical parameters of the burial environment and the formation of different corrosion products. These products can be observed and analysed with the help of various techniques that provide information on their morphology, chemical composition and structure. The analysis of ancient coins is extremely challenging in the presence of heavily corroded surfaces; as quantitative information may not exactly concur with its bulk composition. In the case of silver coins, the use of surface information can be used as a guide for bulk composition only. The current study carries out investigation and characterization of selected coins from a large coin hoard excavated from Amheida, Dakhla oasis, Egypt. The study and analysis of the alloy composition and corrosion products was performed using a multi-technique approach which included Light optical microscopes, Scanning Electron microscope (SEM) coupled with energy dispersive spectroscopy (EDS) and X-ray diffraction analysis. Investigation of the coins revealed the presence of a thick active inhomogeneous corrosion crust, while analysis showed that the coins were made from a binary silver copper alloy (billon) while the corrosion crust was rich in chlorides and carbonates, later identified by XRD analysis as Paratacamite, Malachite and Chrysocolla.

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The effect of silver (Ag) addition to mechanical and electrical properties of copper alloy (Cu) casting product

Cited by 8 publications

References 4 publications

Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy

Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy

Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing

Characterization of Excavated Silver Alloy (Billon) Coins from Amheida, Dakhla Oasis, Egypt

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The effect of silver (Ag) addition to mechanical and electrical properties of copper alloy (Cu) casting product

Cited by 8 publications

References 4 publications

Physical and mechanical impact of Y2O3 on (Cu-7Ag) electrical contact alloy

Physical and mechanical impact of Y2O3 on (Cu-7Ag) electrical contact alloy

Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing

Characterization of Excavated Silver Alloy (Billon) Coins from Amheida, Dakhla Oasis, Egypt

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Product

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About

Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy

Physical and mechanical impact of Y₂O₃ on (Cu-7Ag) electrical contact alloy