Aaron Den Boer - 701 Seminar - November 20 2012 - Course Notes

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Future Work • Modelling ternary dissolution of Nb-C phases in pure liquid Fe – Range of stoichiometry – Solubility product and flux balance at interface Experiments: • Dissolution of Fe-Nb and Fe-Nb-C to validate the binary and ternary models 22
Conclusions • Thermodynamic databases should be used with caution in relation to ferroalloys • The poisonous effect of carbon in ferroniobium should not be marginalized with respect to size and fraction of niobium carbides • The solution of the dissolution equation for the Fe-Nb system with different fluid conditions resulted in a noticeable effect on the TCD and followed a consistent, logical pattern • Consideration of the Fe-Nb-C system for modelling of dissolution and experiments 23
Page 1 and 2: Characterization and Dissolution of
Page 3 and 4: Introduction • Microalloying prod
Page 5 and 6: Introduction • How do these fine
Page 7 and 8: Fe-Nb Phase Diagrams TCFE2 TCFE6 Eu
Page 9 and 10: Problem Definition • Coarse Nb(C,
Page 11 and 12: Characterization of FeNb + 0.12 wt%
Page 17 and 18: Introduction to Model • To solve
Page 19 and 20: It’s more complicated… • If v
Page 21: Results: Convective Fluid 21
Page 25 and 26: Meta-stable phase, η 2 1 Location
Page 27: FeNb solidified at CBMM 27

Aaron Den Boer - 701 Seminar - November 20 2012 - Course Notes

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