Wettability And Reactivity Of Y
            <sub>2</sub>
            O
            <sub>3</sub>
            With Liquid Nickel And Its Alloys

Sobczak, N.; Purgert, Robert; Asthana, R.; Sobczak, J.; Homa, M.; Nowak, R.; Bruzda, Grzegorz; Siewiorek, A.; Pirowski, Z.

doi:10.1002/9781119211747.ch25

“…When the contact angle is <<90° then the wettability is very high and while contact angle is >>90° then the wettability is very low [2][3][4]. The investigation of wetting behavior at elevated temperature is one the essential requirements for metallurgy casting and foundry industry and the characteristics of interfaces between a molten metal and a solid play an important role in selecting suitable materials or processing parameters [5,6]. In some applications the good wettability of the solid by the liquid is preferred, in others it is necessary to prevent the interaction of solid and liquid [7].…”

Section: Introductionmentioning

confidence: 99%

On Liquid Metal Wetting of Casting Rings for DC Casting

Bayat

¹

,

Carlberg

²

2015

Light Metals 2015

0

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“…When the contact angle is <<90° then the wettability is very high and while contact angle is >>90° then the wettability is very low [2][3][4]. The investigation of wetting behavior at elevated temperature is one the essential requirements for metallurgy casting and foundry industry and the characteristics of interfaces between a molten metal and a solid play an important role in selecting suitable materials or processing parameters [5,6]. In some applications the good wettability of the solid by the liquid is preferred, in others it is necessary to prevent the interaction of solid and liquid [7].…”

Section: Introductionmentioning

confidence: 99%

On Liquid Metal Wetting of Casting Rings for DC Casting

Bayat¹,

Carlberg²

2015

Light Metals 2015

0

View full text Add to dashboard Cite

During air-slip direct chill casting of aluminum alloys, uneven or low air pressure areas at the surface of the porous graphite ring mold, can cause the metal to stick to the graphite ring and produce traces along the billets called vertical drags (VD). To prevent this type of defect, it would be an advantage to decrease the wettability of the graphite ring. It has been shown that nanostructured surfaces can have hydrophobic properties, and a question is whether the same effect can be achieved for molten metals. A TiO 2 nanowire structure is proposed to cover the casting ring, and the wetting behavior of such a structure has been studied, and compared to the wetting at a regular graphite ring surface by the dispensed sessile drop method. The results showed that the nanostructured surface very strongly de-wets metal droplets.

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