Wettability of Al&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;-MgO, ZrO&lt;SUB&gt;2&lt;/SUB&gt;-CaO, Al&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;-CaO Substrates with Molten Iron

Shinozaki, Nobuya; Echida, Nobuo; Mukai, Kusuhiro; Takahashi, Yoshiroh; Tanaka, Yasukuni

doi:10.2355/tetsutohagane1955.80.10_748

Cited by 50 publications

(28 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The contact angles of alumina, spinel, and CaO 2Al 2 O 3 inclusions with liquid iron at 1873 K (1600°C) have been reported to be 135 deg, 134 deg, and 120 deg, respectively. [21,28,29] An examination of Eqs. [2] and [3] shows that only the value of cos h R depends on the type of inclusions, whereas the other variables are independent of the type.…”

Section: Interactions Between Inclusion Particles On Liquid-steel mentioning

confidence: 99%

Observation on Physical Growth of Nonmetallic Inclusion in Liquid Steel During Ladle Treatment

Kang

Sahebkar

Scheller

et al. 2011

Metall Mater Trans B

View full text Add to dashboard Cite

The behaviors of several types of inclusions at a high temperature were examined using a confocal scanning laser microscope (CSLM, 1LM21H/SVF17SP). Although alumina inclusions tended to impact on each other, agglomerate, and grow quickly, no other inclusion type, such as spinel as well as solid and liquid calcium aluminate, was observed to attract each other. The results of confocal microscope study were compared with the industrial investigation. For this purpose, many steel samples were taken at different stages of ladle treatment. The samples were analyzed by scanning and light optical microscopes. Approximately 50,000 inclusions of several types were examined. Only alumina inclusions were attracted to each other and agglomerate. No agglomeration by attractive behavior was observed in the other types of inclusions, including liquid inclusions. Both the industrial data and the in situ observation by CSLM indicate that, although the attraction force and the agglomeration play a significant role in the growth of alumina inclusions, the agglomeration of spinel and calcium aluminate inclusions does not need special consideration in ladle treatment. The agglomeration of liquid calcium aluminate inclusions took place only when they occasionally met as a result of external force, which led to low collision probability. However, the agglomeration of the liquid calcium aluminate inclusions along with alumina particles could be detrimental in the casting process.

show abstract

Section: Interactions Between Inclusion Particles On Liquid-steel mentioning

confidence: 99%

Observation on Physical Growth of Nonmetallic Inclusion in Liquid Steel During Ladle Treatment

Kang

Sahebkar

Scheller

et al. 2011

Metall Mater Trans B

View full text Add to dashboard Cite

show abstract

“…Previous studies, [4,5,6] in which manganese or zirconia ceramics participate, are shown in Table I for comparison with this study. These studies have been carried out in an argon or helium gas atmosphere.…”

Section: A Contact Angle and Surface Tensionmentioning

confidence: 95%

Wettability, surface tension, and reactivity of the molten manganese/zirconia-yttria ceramic system

Shinozaki

Sonoda

Mukai³

1998

Metall Mater Trans A

View full text Add to dashboard Cite

A basic research study for improvement of plasma-sprayed zirconia coatings has been conducted. The contact angle and surface tension of the molten manganese/zirconia-yttria ceramic system were measured at 1573 K by the sessile drop method, suggesting that molten manganese would spontaneously infiltrate open pores in zirconia coatings. Structure and elementary composition development of zirconia ceramics caused by reaction with manganese were examined by using scanning electron microscopy (SEM), an electron probe microanalyzer (EPMA), and an X-ray diffractometer (XRD). Manganese not only stabilized cubic zirconia but also contributed to the growth and volume increase of zirconia particles. In this article, the mechanism of making zirconia coatings dense with manganese is discussed based on the results of experiments.

show abstract

“…Many researchers have therefore investigated the mechanism of clogging of immersion nozzles from several viewpoints. [1][2][3][4][5][6][7] One approach is to focus on interfacial properties such as interfacial tension and wettability. Singh 1) proposed a mechanism for alumina buildup in tundish nozzles by considering the interfacial tension between alumina inclusions and molten steel, and the wettability between them.…”

Section: Introductionmentioning

confidence: 99%

“…one which reacts with inclusions and forms low-melting oxide phases, is effective for reducing adhesion of inclusions to the refractory surface. Shinozaki et al 5) investigated the wettabilities among a number of complex oxides, which were used as simulated inclusions, and molten iron to confirm the effects of wettability on the adhesion of inclusions. They concluded that it is possible to state qualitatively that an improvement in wettability reduces clogging of the immersion nozzle.…”

Section: Introductionmentioning

confidence: 99%

Effects of Interfacial Properties between Molten Iron and Alumina on Neck Growth of Alumina Balls at Sintering in Molten Iron

et al. 2014

View full text Add to dashboard Cite

The effects of interfacial properties such as interfacial tension and wettability on the adhesion, agglomeration, and coalescence of inclusions on the immersion nozzle in a continuous casting process have not yet been evaluated quantitatively. In the present work, we focused on the neck growth of alumina balls at sintering because the adhesion, agglomeration, and coalescence of inclusions are regarded as being the consequence of sintering of oxides. We compared the neck growth of alumina balls at sintering in molten iron with that under an Ar gas atmosphere in order to clarify the effects of interfacial properties between alumina balls and molten iron on the sintering of alumina balls in molten iron. We found that neck growth in molten iron proceeds much faster than that under an Ar gas atmosphere. In addition, an equation for the neck growth of alumina balls in molten iron was formulated by evaluating the interfacial properties, i.e., the interfacial tension and wettability, between alumina balls and molten iron. The calculated results derived by considering the capillary phenomena of molten iron at the gap between alumina balls as the effect of wettability were in reasonable agreement with the experimental results in molten iron. These findings show that the non-wetting by molten iron of alumina balls promotes neck growth of alumina balls at sintering in molten iron.

show abstract

Wettability of Al<SUB>2</SUB>O<SUB>3</SUB>-MgO, ZrO<SUB>2</SUB>-CaO, Al<SUB>2</SUB>O<SUB>3</SUB>-CaO Substrates with Molten Iron

Cited by 50 publications

References 4 publications

Observation on Physical Growth of Nonmetallic Inclusion in Liquid Steel During Ladle Treatment

Observation on Physical Growth of Nonmetallic Inclusion in Liquid Steel During Ladle Treatment

Wettability, surface tension, and reactivity of the molten manganese/zirconia-yttria ceramic system

Effects of Interfacial Properties between Molten Iron and Alumina on Neck Growth of Alumina Balls at Sintering in Molten Iron

Contact Info

Product

Resources

About