Abstract

The solubility of nitrogen in liquid manganese, in equilibrium with gas containing varying amounts of nitrogen, has been determined at 1300, 1400, and 1500°C. At one atm pressure of nitrogen, the solubility is 2.6 wt pct at 1300°C and decreases to 1.7 wt pct at 1500°C. Dissolution of nitrogen in manganese does not follow Sievert’s law. The activity coefficient of nitrogen in manganese increases with increasing nitrogen concentration. At one atm nitrogen pressure, the value of the activity coefficient, relative to the infinitely dilute solution, is 1.55 between 1300 and 1500°C.

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