Impurity effects in high-conductivity copper

Hsu, Yuan-Chan; O’Reilly, Beatriz

doi:10.1007/bf03354339

Cited by 8 publications

(2 citation statements)

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“…After silver, pure copper has the highest electrical conductivity and is widely used in electronics and electrical engineering as well as in the energy industry [2]. The good thermoelectrical properties of pure copper are of great importance, especially in large electrical connectors, water-coolers, hot blast furnace tuyeres, coils, primary rods, etc [1,2,[5][6][7]. There are two possibilities to get the ultimate shape of components made from pure copper.…”

Section: Introductionmentioning

confidence: 99%

“…These are the sources of the occurrence of internal microporosity and macroporosity [5,13]. The source of these inclusions can be the metal charge, the atmosphere in the furnace and in the foundry, moisture, and even the tools that are used [1,2,6,7,10]. The presence of such impurities is highly undesirable because of the lower strength properties due to decreases in the area of the cross section [14,15] as well as reductions in the thermoelectrical and technological properties [3,16,17].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Mg Additive on the Structure and Electrical Conductivity of Pure Copper Castings

Kranc

Sikora

Górny

et al. 2017

Archives of Foundry Engineering

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The aim of this paper was to attain defect free, pure copper castings with the highest possible electrical conductivity. In this connection, the effect of magnesium additives on the structure, the degree of undercooling (ΔTα = Tα-Tmin, where Tα -the equilibrium solidification temperature, Tmin -the minimum temperature at the beginning of solidification), electrical conductivity, and the oxygen concentration of pure copper castings have been studied. The two magnesium doses have been investigated; namely 0.1 wt.% and 0.2 wt.%. A thermal analysis was performed (using a type-S thermocouple) to determine the cooling curves. The degree of undercooling and recalescence were determined from the cooling and solidification curves, whereas the macrostructure characteristics were conducted based on a metallographic examination. It has been shown that the reaction of Mg causes solidification to transform from exogenous to endogenous. Finally, the results of electrical conductivity have been shown as well as the oxygen concentration for the used Mg additives.

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Section: Introductionmentioning

confidence: 99%