Experimental investigation of surface adhesion of Titan analog materials: Mitigation by dust-repellent coatings
| Autor: | William L. Luedeman, Chao He, Sarah M. Hörst, Jason J. Benkoski, John O. Teehan, Ralph D. Lorenz |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences Astronomy and Astrophysics Adhesion Tribology 01 natural sciences Regolith Surface energy Indium tin oxide symbols.namesake Space and Planetary Science 0103 physical sciences Sapphire symbols Composite material Titan (rocket family) 010303 astronomy & astrophysics Triboelectric effect 0105 earth and related environmental sciences |
| Zdroj: | Planetary and Space Science. 179:104721 |
| ISSN: | 0032-0633 |
| DOI: | 10.1016/j.pss.2019.104721 |
| Popis: | We report an experimental investigation of organic Titan regolith simulant interactions with transparent surfaces. In the absence of prior triboelectrification of the particles and surface, the area coverage of sprinkled particles increases with increasing substrate surface energy, as expected. Bare sapphire, sapphire coated with indium tin oxide (ITO), and sapphire coated with ITO and fluorosilane collected 20%, 10%, and 5% particles, respectively. Under turbulent conditions that promote triboelectric charging, the adhesion of Titan regolith analogs is enhanced. Bare sapphire occluded by more than 60% in some cases. However, conductive ITO generally reduced the area coverage below 10% when electrically grounded, and the fluorosilane treatment reduced it slightly further. The surface coatings tested, and anti-static measures more generally, therefore provide significant mitigation of optical window contamination. |
| Databáze: | OpenAIRE |
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