Electrical conductivity of Cu-Ag in situ filamentary composites

Yuantao, Ning; Zhang, Xiao-Hui; Wu, Yue

doi:10.1016/s1003-6326(07)60102-2

Cited by 14 publications

(14 citation statements)

References 10 publications

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“…The electrical properties of the alloy increase as the alloy component is removed from the matrix. Therefore, the combination of precipitation hardening and strain hardening of Cu-Ag alloys may consequently lead to obtaining a material with very high mechanical and electrical properties [19][20][21]. Such features of Cu-Ag alloys may be used to obtain wires characterized by a set of very high mechanical and the requisite electrical properties required for electrotechnical applications [22].…”

Section: Introductionmentioning

confidence: 99%

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Kawecki

Sieja-Smaga

Korzeń

et al. 2021

JCME

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The individual sections, wiring and construction of electromagnet windings responsible for strong magnetic field impulses may be one application for hypoeutectic Cu-Ag alloys. High electrical properties and mechanical properties (tensile strength, yield strength, impact strength) as well as high heat, fatigue and rheological resistance are required for these kinds of applications due to the unique nature of such operations (strong vibrations of high frequency and amplitude resulting from Lorenz forces and the possibility of significant and rapid heating from Jule’s heat). The limited solubility of copper and silver in the solid state enables the effective modification of the alloys’ microstructure through heat treatment and further shaping of their high mechanical and electrical properties via cold plastic working. The article presents the manufacturing of Cu-Ag alloys with the weight percent of Ag between 3 and 7 using the continuous casting process along with research on the physicochemical, mechanical and electrical properties of the obtained casts. The research on the amount of plastic deformation and its influence on the wire drawing process and the mechanical and electrical properties of the wires is also discussed. The temperature coefficients of resistance were defined in order to determine the temperature influence on the electrical resistance changes dynamics. The microstructural analysis was carried out in the as-cast state. The preliminary research conducted indicates that the obtained Cu-Ag alloys in the as-cast state exhibit a set of high mechanical and electrical properties. The prospective next stage of research includes the selection of favourable heat treatment parameters which would provide optimally modified microstructure of the alloys, as well as determining the deformation coefficients allowing for further increases in the mechanical and electrical properties.

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Section: Introductionmentioning

confidence: 99%

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Kawecki

Sieja-Smaga

Korzeń

et al. 2021

JCME

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“…The largest number of research results were published in Japan (Oshaki, Yamazaki, Hono, Shibata, Arai, Watanabe, Asano, Kiyoshi), China (Zhang, Ning, Meng, Liu, Tian), and South Korea (Hoon Cho, Byoung-Soo Lee, Bok-Hyun Kang, Ki-Young Kim, Choi, Kwon), where virtually 80% of all available works come from. The other research centres are located mainly in the US (Han, Vasquez, Kalu, Hong, Ceylan, Sheng, Campbell), Canada (Hill, Wood, Embury), Germany (Mattissen, Heringhaus, Grunberger, Heilmaier, Schultz), Belgium (Frings, Bockstal), Switzerland (Benghalem, Morris), Russia (Gaganov, Nikulin, Vorobieva, Shokov, Pantsyrnyj), and Sweden (Fredrikson, Haddad-Sabsevar) [1][2][3][4][5][6][7][8]. The latest publications are from the previous two months of the current year.…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Properties and Microstructures of High Strength and High Conductivity Copper-Silver Wires / Otrzymywanie Oraz Własności I Mikrostruktura Wysokowytrzymałych I Wysoko Przewodzących Drutów Ze Stopów Cu-Ag

Kawecki¹,

Knych²,

Sieja-Smaga³

et al. 2012

Archives of Metallurgy and Materials

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Research results of manufacturing composite filamentary nanostructure Cu-Ag alloys with silver addition from 5 to 15% wt. are presented in the paper. Manufacturing technology of these composites and variable solubility of silver in copper and copper in silver in the range of solid solutions. Suitable quantity and processing sequences of high deformation plastic working and heat treatment allows to obtain wires constituted from Cu and Ag fibres with nanometric transverse dimensions and in consequence provide to optimum superposition of high mechanical strength, high electrical conductivity and sufficient ductility of Cu-Ag alloys.The paper presents the method of continuous casting of alloys, selected physico-chemical properties and degree of deformation. Influence of chosen heat treatment method over electrical and mechanical properties of both casts and micro wires on mechanical and electrical properties of cast materials during converting them into micro wires with tensile strength higher than 1200 MPa and electrical conductivity higher than 40 MS/m are presented too.Research results of optical and scanning microscopy structure analysis were presented for casts and wires submitted to various thermo-mechanical strengthening.Keywords: silver-copper alloys, continuous casting, drawing, micro-wires, filamentary micro-composite, nanostructure, high conductivity, high strength Praca dotyczy badań nad kształtowaniem zespołu bardzo wysokich własności wytrzymałościowych i elektrycznych drutów i mikro-drutów ze stopów CuAg5 i CuAg15. Technologia wytwarzania drutów ze stopów Cu-Ag wykorzystuje zjawisko obustronnej zmiennej rozpuszczalności składników stopów w stanie stałym. Jak wykazały przeprowadzone badania, odpowiednie połączenie przeróbki plastycznej materiałów o strukturze odlewniczej z międzyoperacyjną obróbką cieplną umożliwia uzyskanie korzystnej kompozytowej mikrostruktury silnie wydłużonych włókien Cu i Ag o nanometrycznych wymiarach poprzecznych. Optymalizacja parametrów technologicznych pozwala na uzyskanie drutów i mikro-drutów Cu-Ag o wytrzymałości na rozciąganie w zakresie 1000÷1300 MPa przy równocześnie wysokiej przewodności elektrycznej wynoszącej 70÷85% w skali IACS.W artykule pokazano metodę uzyskania stopów Cu-Ag oraz wyniki badań wybranych własności fizykochemicznych, schemat odkształcenia oraz badania wpływu wstępnej obróbki cieplnej materiałów w stanie odlanym na zmianę własności elektrycznych i mechanicznych zarówno odlewów jak i drutów po przeróbce plastycznej. Zamieszczono także wyniki obserwacji strukturalnych przy zastosowaniu mikroskopii optycznej i skaningowej odlewów oraz ewolucję struktury po przeróbce plastycznej oraz po różnych etapach międzyoperacyjnej obróbki cieplnej.

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“…With the rapid development in the electronic industries, the Cu-Ag alloy has been applied to many fields such as microelectronics, transportation, aerospace and mechanical manufacturing, and because of its excellent strength and electrical conductivity, has been the preferred conductor material in products such as the medical equipment, the contact wire of the high-speed train, the strong magnetic field system and the lead frame of the large scale integrated circuit [1][2][3] . But there is a waxing and waning relationship between strength and conductivity of the Cu-Ag alloy; therefore it is a key research and development direction for researchers to solve the contradictory relationship and to find a kind of material with both of high strength and high conductivity and a preparation technique [3] .…”

mentioning

confidence: 99%

“…In the past forty years, the size of the Cu-Ag alloy in-situ composites with the fibrous microstructure has been down to nanometer through cold-working such as rolling, drawing and forging, and owing to the great compatibility between Cu phase and Ag phase, the strength of mixture is usually more than the theoretical estimate value [2,4] . In addition, severe plastic deformation (SPD), such as equal channel angular pressing (ECAP), high-pressure torsion (HPT), and accumulative roll bonding (ARB), due to the simple process and low cost, has been recognized as one of the most promising technology by international researchers [5][6][7] .…”

mentioning

confidence: 99%

Effects of Different Preparation Techniques on Mechanical Property and Electrical Conductivity of Cu-8wt% Ag Alloy by Continuous Casting

Shen

Xie

et al. 2016

Rare Metal Materials and Engineering

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Cu-8wt%Ag alloy was prepared by two kinds of preparation techniques, namely continuous casting + cold wire-drawing deformation preparation (CC + CD) and continuous casting + equal channel angular pressing + cold wire-drawing deformation preparation (CC + ECAP + CD), and subsequently the aging treatment was performed. We measured the mechanical property and the electrical property of the Cu-8wt%Ag alloy with different strains, explored the changing rules of the microstructure, the mechanical property and the electrical property by different preparation techniques. Then we analyzed the changing reasons of performance and discussed whether the better comprehensive performance could be acquired by combining the ECAP with the traditional cold-processing. The results show that the comprehensive performance of the Cu-8wt%Ag alloy prepared by CC + ECAP + CD is a little better than that by CC + CD. It is significant and valuable to solve the waxing and waning problem between the high strength and high conductivity of the Cu-Ag alloy.

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Electrical conductivity of Cu-Ag in situ filamentary composites

Cited by 14 publications

References 10 publications

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Research on Mechanical and Electrical Properties of Cu-Ag Alloys Designed for the Construction of High Magnetic Field Generators

Fabrication, Properties and Microstructures of High Strength and High Conductivity Copper-Silver Wires / Otrzymywanie Oraz Własności I Mikrostruktura Wysokowytrzymałych I Wysoko Przewodzących Drutów Ze Stopów Cu-Ag

Effects of Different Preparation Techniques on Mechanical Property and Electrical Conductivity of Cu-8wt% Ag Alloy by Continuous Casting

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