High-temperature wettability and structure of the TiO2–MnO–SiO2–Al2O3 welding flux system

J. B. Kim, J. K. Choi, I. W. Han, Il Sohn

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of TiO2/SiO2 and SiO2/Al2O3 ratio on the wettability of the TiO2–MnO–SiO2–Al2O3 quaternary welding flux system was studied using the sessile drop method by measuring the contact angle at the liquid/solid interface. The contact angle was measured at 1773 K to determine the relationship between wettability and flux structure, which is affected by the flux composition. The surface and interfacial tensions of the TiO–MnO–SiO2–Al2O3 flux system were calculated using Boni's equation and Young's equation, respectively, based on the measured contact angle. The adhesion energy, which corresponds to the energy required to separate the flux from a substrate, was calculated using Dupre's equation. The interfacial tension between the liquid flux and Pt-10Rh decreased and the surface tension increased with higher TiO2 and Al2O3. The results of the Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) analyses of as-quenched fluxes from 1773 K also support the structural relationship with the wettability. It was found that both O (non-bridged oxygen) and O2 − (free oxygen) affect the interfacial tension between the flux and the substrate.

Original languageEnglish
Pages (from-to)218-226
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume432
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

wettability
welding
Wetting
Welding
Fluxes
Surface tension
interfacial tension
Contact angle
Temperature
Oxygen
Liquids
oxygen
Substrates
liquid-solid interfaces
Fourier transform infrared spectroscopy
Raman spectroscopy
adhesion
Adhesion
X ray photoelectron spectroscopy
infrared spectroscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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title = "High-temperature wettability and structure of the TiO2–MnO–SiO2–Al2O3 welding flux system",
abstract = "The effect of TiO2/SiO2 and SiO2/Al2O3 ratio on the wettability of the TiO2–MnO–SiO2–Al2O3 quaternary welding flux system was studied using the sessile drop method by measuring the contact angle at the liquid/solid interface. The contact angle was measured at 1773 K to determine the relationship between wettability and flux structure, which is affected by the flux composition. The surface and interfacial tensions of the TiO–MnO–SiO2–Al2O3 flux system were calculated using Boni's equation and Young's equation, respectively, based on the measured contact angle. The adhesion energy, which corresponds to the energy required to separate the flux from a substrate, was calculated using Dupre's equation. The interfacial tension between the liquid flux and Pt-10Rh decreased and the surface tension increased with higher TiO2 and Al2O3. The results of the Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) analyses of as-quenched fluxes from 1773 K also support the structural relationship with the wettability. It was found that both O− (non-bridged oxygen) and O2 − (free oxygen) affect the interfacial tension between the flux and the substrate.",
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High-temperature wettability and structure of the TiO2–MnO–SiO2–Al2O3 welding flux system. / Kim, J. B.; Choi, J. K.; Han, I. W.; Sohn, Il.

In: Journal of Non-Crystalline Solids, Vol. 432, 01.01.2016, p. 218-226.

Research output: Contribution to journalArticle

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AB - The effect of TiO2/SiO2 and SiO2/Al2O3 ratio on the wettability of the TiO2–MnO–SiO2–Al2O3 quaternary welding flux system was studied using the sessile drop method by measuring the contact angle at the liquid/solid interface. The contact angle was measured at 1773 K to determine the relationship between wettability and flux structure, which is affected by the flux composition. The surface and interfacial tensions of the TiO–MnO–SiO2–Al2O3 flux system were calculated using Boni's equation and Young's equation, respectively, based on the measured contact angle. The adhesion energy, which corresponds to the energy required to separate the flux from a substrate, was calculated using Dupre's equation. The interfacial tension between the liquid flux and Pt-10Rh decreased and the surface tension increased with higher TiO2 and Al2O3. The results of the Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) analyses of as-quenched fluxes from 1773 K also support the structural relationship with the wettability. It was found that both O− (non-bridged oxygen) and O2 − (free oxygen) affect the interfacial tension between the flux and the substrate.

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