Thermodynamics of Titanium and Nitrogen in Fe-Si Melt

Thermodynamics of Titanium Oxide in CaO–SiO2–Al2O3–MgOsatd–CaF2 Slag Equilibrated with Fe–11mass%Cr Melt

“…In the present study, the activity of metallic element such as silicon and titanium was calculated based on the following classical Wagner formalism using the first-and secondorder interaction parameters, which are listed in Table 3. [23][24][25][26][27][28][29][30][31][32][33][34][35] . (4) where f M , e and r is, respectively, the Henrian activity coefficient of element M, and the first-and second-order interaction parameters between each element.…”

Thermodynamic Relation between Aluminum and Titanium in Liquid Iron

“…Four specimen of each metal sample were prepared for the analysis of nitrogen and oxygen by the inert gas fusion-infrared absorptiometry. For the analysis of aluminum and titanium, the metal sample (0.2 g) was dissolved in 20 mL of HCl (1ϩ1) in a glass beaker of 50 mL capacity heated in a water bath for 2 h. The leaching test of TiN powder (99% purity, Ͻ10 mm) indicated that TiN was nearly insoluble in dilute HCl (1ϩ1) solution heated in a © 2008 ISIJ water bath up to 6 h. In author's previous studies, 3,4,6) the detailed procedure for chemical analysis is available. The analytical limit for aluminum and titanium in metal sample was 5Ϯ1 mass ppm.…”

Thermodynamics of Titanium, Nitrogen and TiN Formation in Liquid Iron

“…The nitrogen and oxygen contents in the metal sample were measured by the inert gas fusion-infrared absorptiometry technique with an accuracy of Ϯ1 mass ppm. For the analysis of titanium and silicon, the metal sample (0.2 g) was dissolved in 20 mL of HCl(1ϩ1) in a glass beaker of 50 mL capacity heated in a water bath for 2 h. The leaching test of TiN powder (99 % purity, Ͻ10 mm) in various acid solutions indicated that TiN was nearly insoluble in dilute HCl(1ϩ1) solution heated in a water bath up to 6 h. In author's previous studies, 13) the detailed procedure for chemical analysis is available. After each experimental run, the Fe-Ti-N melt contained in an alumina crucible was quenched rapidly by helium gas blowing onto the melt.…”