Phase Equilibria of the MnO-SiO2-Al2O3-MnS System
SCIE
SCOPUS
- Title
- Phase Equilibria of the MnO-SiO2-Al2O3-MnS System
- Authors
- Woo, DH; Lee, HG
- Date Issued
- 2010-07
- Publisher
- "WILEY-BLACKWELL PUBLISHING, INC"
- Abstract
- Phase equilibria of the MnO-SiO2-MnS system in the temperature range of 1185 degrees-1400 degrees C and the MnS solubility in the MnO-SiO2-Al2O3-MnS system at 1200 degrees C under low oxygen partial pressure have been experimentally investigated using equilibration/quenching technique followed by electron probe X-ray microanalysis and X-ray diffraction analysis. Based on the experimental results, polythermal projection of the MnO-SiO2-MnS system was estimated. The system has two ternary eutectic points; namely, one at 1173 degrees +/- 3 degrees C where phases of MnS, MnO, "A" (67.0 mass% MnO-23.6 mass% SiO2-9.4 mass% MnS), and liquid coexist, and the other at 1187 degrees +/- 3 degrees C where phases of MnS, Mn2SiO4, MnSiO3, and liquid coexist. All invariant reactions observed above were discussed. The ternary compound "B" containing 74.4 mass% MnO-22.0 mass% SiO2-3.6 mass% MnS was observed at 1300 degrees C. In the MnO-SiO2-Al2O3-MnS system, the MnS solubility is strongly affected by Al2O3 content and also the MnO/SiO2 ratio. The solubility increased as MnO/SiO2 ratio increased at a constant Al2O3 content and decreased as Al2O3 content increased at a constant MnO/SiO2 ratio. In addition, depending on the Al2O3 content and MnO/SiO2 ratio, the liquid phase is possibly saturated with not only MnS but also other solid oxide phases. In view of inclusion utilization for free-cutting steel, it might have an advantage to decrease the Al2O3 content and increase the MnO/SiO2 ratio.
- Keywords
- THERMODYNAMIC PROPERTIES; SULFIDE CAPACITIES; MNS; OPTIMIZATION; DIAGRAMS; MNO-SIO2; STEELS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25415
- DOI
- 10.1111/J.1551-2916.2010.03705.X
- ISSN
- 0002-7820
- Article Type
- Article
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 93, no. 7, page. 2098 - 2106, 2010-07
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- There are no files associated with this item.
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