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Thermodynamics of surfaces and adsorption in the Fe-C-S-O system
KTH, Superseded Departments, Materials Science and Engineering.
2000 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 31, no 2, 267-276 p.Article in journal (Refereed) Published
Abstract [en]

Surface tension experiments have been conducted on Fe-C-S-O alloys using the sessile drop technique at 1823, 1873, and 1923 K in a purified argon atmosphere. The experimental data indicate lowering of surface tension values for alloys with low carbon and oxygen contents relative to the corresponding ternary Fe-S-O system of comparable compositions. The data exhibit an increasing trend of the surface tension values as a function of carbon and oxygen contents and temperature of the melt, Modified Butler's equations have been used in conjunction with the consistent thermodynamic relations for a dilute quaternary system to calculate the surface tensions and adsorption functions of the system, The calculated values are in excellent agreement with those of the experimental data for compositions having lower oxygen at 1823 K, however, the values for the alloys containing higher oxygen contents depart from those of the experimental data. The calculated surface tension values agree within 150 mN/m with those of the experimental data at 1873 K. The agreement, in general, has been favorable despite the constraints involved in the calculations as discussed in the text.

Place, publisher, year, edition, pages
2000. Vol. 31, no 2, 267-276 p.
Keyword [en]
liquid-iron, tension, alloys, oxygen
Identifiers
URN: urn:nbn:se:kth:diva-19707ISI: 000086633400005OAI: oai:DiVA.org:kth-19707DiVA: diva2:338399
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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