Equilibrium of Mg-O and the Effect of Fe,Al and Cr on the Activity of Mg in Molten Nickel
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摘要: 在密閉容器中用蒸汽平衡法研究了1480℃～1590℃內,鎳液中鎂-氧反應平衡,以及1480℃下鎳液中合金元素Fe、Al、Cr對鎂的活度的影響。實驗測得,1480～1580℃下:$\log {K_{{\rm{MgO}}}} = 0.50 + 1.27 \times {10^4}/T;△G_{{\rm{MgO}}}^{\rm{o}} = 2.43 \times {10^5} - 9.57T({\rm{J/mol}});e_{\rm{O}}^{{\rm{Mg}}} = 1.10 \times {10^3} - 2.19 \times {10^6}/T$。1480℃下：$e_{{\rm{Mg}}}^{{\rm{Fe}}} = - 0.28;e_{{\rm{Mg}}}^{{\rm{Al}}} = - 0.51;e_{{\rm{Mg}}}^{{\rm{Cr}}} = 0.72$。Abstract: The equilibrium constant of Mg-O in Nickel melt at the temperature range of 1 480℃ to 1580℃ was determined with the vapour equilibrium method in a sealed chamber. The influence of the alloying elements Fe, Al and Cr on the activity of Mg in nickel melts at 1480℃ mas investigated. It was found that at 1480℃ to 1580℃: $\log {K_{{\rm{MgO}}}} = 0.50 + 1.27 \times {10^4}/T;G_{{\rm{MgO}}}^{\rm{o}} = 2.43 \times {10^5} - 9.57T({\rm{J/mol}});e_{\rm{Mg}}^{{\rm{O}}} = 1.10 \times {10^3} - 2.19 \times {10^6}/T$; And at 1480℃: $e_{{\rm{Mg}}}^{{\rm{Fe}}} = - 0.28;e_{{\rm{Mg}}}^{{\rm{Al}}} = - 0.51;e_{{\rm{Mg}}}^{{\rm{Cr}}} = 0.72$
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Key words:
- nickel /
- Mg-O equilibrium /
- activity /
- alloying element
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