Investigation of the reactions between oxygen-containing iron and SiO2 substrate by X-ray sessile-drop technique
- 140 Downloads
The X-ray sessile-drop method was employed in the present investigation to measure the contact angle between liquid iron and a silica substrate under argon as well as CO-CO2-Ar atmospheres in the temperature range of 1823 to 1833 K. In the latter case, the measurements were carried out in the dynamic mode, and the contact-angle changes were followed as a function of time as oxygen in the gas dissolved in the metal. The static measurements in argon showed that the contact angles in the experimental temperature range are of the order of 135 deg, similar to those observed in the case of the alumina substrate. In the dynamic mode, oxygen partial pressures varying between 9.9·10−4 and 1.5·10−2 Pa were imposed on the system. In these experiments, the contact angle decreased in two stages, with an intermediate steady-state region. Fayalite slag, formed due to the reaction between the metallic phase and the substrate, was found to accumulate around the drop. The results are of relevance in understanding the mechanism of corrosion of silica-containing refractories by molten iron.
KeywordsContact Angle Material Transaction Oxygen Partial Pressure Experimental Series Liquid Iron
Unable to display preview. Download preview PDF.
- 3.I. Jimbo and A.W. Cramb: Iron Steel Inst. J. Int, 1992, vol. 32, pp. 26–35.Google Scholar
- 4.A. Kasama, A. McLean, W.A. Miller, Z. Morita, and M.J. Ward: Can. Metall. Q., 1983, vol. 22, pp. 9–17.Google Scholar
- 5.B.C. Allen and W.D. Kingery: J. Met., 1959, vol. 215, pp. 30–37.Google Scholar
- 7.K. Nogi and K. Ogino: Can. Metall. Q., 1983, vol. 22, pp. 19–28.Google Scholar
- 8.Handbook of Chemistry and Physics, 61st ed., R.C. West, ed., CRC Press, Boca Raton, FL, 1980.Google Scholar
- 9.I. Barin: Thermodynamical Data of Pure Substances, Part I and II, VCH, New York, NY, 1993.Google Scholar
- 10.Thermocalc, http://met.kth.se, Royal Institute of Technology, Stockholm.Google Scholar
- 11.E.T. Turkdogan: Physical Chemistry of High-Temperature Technology, Academic Press, New York, NY, 1980, p. 94.Google Scholar