The diffusivity of oxygen in liquid copper-lead alloys |
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Authors: | Shinya Otsuka Masami Matsuyama Zensaku Kozuka |
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Affiliation: | (1) Department of Metallurgical Engineering, Faculty of Engineering, Osaka University, Osaka, Japan |
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Abstract: | The oxygen diffusivity in liquid copper-lead alloys at 1403 K (1130° C) was measured using the electrochemical cell: Ni−NiO/ZrO2(+CaO)/O in liquid Cu−Pb alloy(I)/ZrO2(+CaO)/O in liquid Cu−Pb alloy (II). Oxygen in liquid Cu−Pb alloy (I) was transferred to the right by applying a preselected voltage between the two liquid Cu−Pb alloys. The oxygen diffusivity in liquid Cu−Pb alloy(I) was calculated from the emf change with time between the Ni−NiO and liquid Cu−Pb alloy (I) electrodes. The results were: It was found that the oxygen diffusivity in liquid copper-lead alloys did not change drastically over the entire composition range, in contrast with that reported by other investigators for liquid copper-nickel alloys. The oxygen diffusivity in pure liquid lead agreed with the results of our previous work using an FeO−Fe3O4 mixture as a sink for oxygen. |
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