Effect of oxidation on the Mechanical Properties of Liquid Gallium and Eutectic Gallium-Indium

Physics – Fluid Dynamics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

18 pages, 9 figures

Scientific paper

Liquid metals exhibit remarkable mechanical properties, in particular large surface tension and low viscosity. However, these properties are greatly affected by oxidation when exposed to air. We measure the viscosity, surface tension, and contact angle of gallium (Ga) and a eutectic gallium-indium alloy (eGaIn) while controlling such oxidation by surrounding the metal with an acid bath of variable concentration. Rheometry measurements reveal a yield stress directly attributable to an oxide skin that obscures the intrinsic behavior of the liquid metals. We demonstrate how the intrinsic viscosity can be obtained with precision through a scaling technique that collapses low- and high-Reynolds number data. Measuring surface tension with a pendant drop method, we show that the oxide skin generates a surface stress that mimics surface tension and develop a simple model to relate this to the yield stress obtained from rheometry. We find that yield stress, surface tension, and contact angle all transition from solid-like to liquid behavior at the same critical acid concentration, thereby quantitatively confirming that the wettability of these liquid metals is due to the oxide skin.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Effect of oxidation on the Mechanical Properties of Liquid Gallium and Eutectic Gallium-Indium does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Effect of oxidation on the Mechanical Properties of Liquid Gallium and Eutectic Gallium-Indium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of oxidation on the Mechanical Properties of Liquid Gallium and Eutectic Gallium-Indium will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-498444

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.