Abstract

The distribution of copper between liquid silver and liquid iron, Fe-C, and Fe-C-Si alloys was studied at 1600°C. From the data and the activity of copper in silver obtained from the phase diagrams, the activity coefficients of copper in iron up to 3 atomic pct are log γ Cu = 0.90 − 2.4 NCu and γ°Cu = 8.0. The effect of carbon up to saturation is expressed as log γ(c)Cu = 1.8 Nc. The effect of silicon up to 11 atomic pct is insignificant.

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