Effect of oxidation on the mechanical properties of liquid gallium and eutectic gallium-indium
By Qin Xu, Nikolai Qudalov, Qiti Guo, Heinrich M. Jaeger, Eric Brown. 2012
233 citations recorded by the source corpus.
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 and a eutectic gallium-indium alloy while controlling such oxidation by surrounding the metals 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 ...
Subfields: Computational Mechanics, Electrical and Electronic Engineering, Surfaces, Coatings and Films
View Paper: https://www.semanticscholar.org/paper/880855e06f0d5177d9db21836c2032503311d0d1
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In Computational Mechanics
In Electrical and Electronic Engineering
Citations in the corpus
- A Soft Strain Sensor Based on Ionic and Metal Liquids (2013, background): “Although the oxide skin of eGaIn [26], [31] possesses many characteristics that would make it a good electrode for”