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On Liquid Metal Wetting of Casting Rings for DC Casting
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-3622-4247
2015 (English)In: Light Metals 2015 / [ed] Hyland, M., Wiley-Blackwell, 2015, p. 855-863Chapter in book (Refereed)
Abstract [en]

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 Ti02 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.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2015. p. 855-863
Keywords [en]
Contact angle, Direct chill (DC) casting, Sessile drop, Vertical drags (YD), Wettability
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:miun:diva-33116DOI: 10.1002/9781119093435.ch144Scopus ID: 2-s2.0-85015951699OAI: oai:DiVA.org:miun-33116DiVA, id: diva2:1186413
Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-02-28Bibliographically approved

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Bayat, NazlinCarlberg, T.

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