| WAN Yan-ling,WANG Bo,XI Chuan-wen,YU Hua-dong.Ice Friction Properties of Composite Microstructures on Stainless Steel Surface[J],49(4):198-204 |
| Ice Friction Properties of Composite Microstructures on Stainless Steel Surface |
| Received:June 14, 2019 Revised:April 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.04.022 |
| KeyWord:ice friction superhydrophobic surfaces adhesion capillary bridge stainless steel |
| Author | Institution |
| WAN Yan-ling |
Key Laboratory of Cross-Scale Micro-Nano Manufacturing of Ministry of Education, Changchun University of Science and Technology, Changchun , China |
| WANG Bo |
Key Laboratory of Cross-Scale Micro-Nano Manufacturing of Ministry of Education, Changchun University of Science and Technology, Changchun , China |
| XI Chuan-wen |
Key Laboratory of Cross-Scale Micro-Nano Manufacturing of Ministry of Education, Changchun University of Science and Technology, Changchun , China |
| YU Hua-dong |
Key Laboratory of Cross-Scale Micro-Nano Manufacturing of Ministry of Education, Changchun University of Science and Technology, Changchun , China |
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| Abstract: |
| In order to explore the ice frictional properties of superhydrophobic composite structure surfaces, a nano-second laser system was used to construct a lotus-like groove composite structure on the surface of stainless steel. The properties of ice friction under different wettability, adhesion and friction speed were observed. It can be shown from the results that the micro-submicron composite structure is the main reason for super-hydrophobic high adhesion of the stainless steel surface. Heat treatment eliminates the timeliness of the sample surface, and the chemical modification realizes super-hydrophobic low adhesion. The temperature changes the contact state of the water droplets on the surface of samples. Under the condition of 0~1 mm/s sliding speed and 2 N load, the surface with larger sliding speed, better hydrophobicity and lower adhesion has smaller friction coefficient. This is because the water film produced by friction heat forms a lubricating layer, which makes the ice friction in the mixed friction, thus reducing the friction resistance. However, too much water film will form a lot of capillary bridge, and increase the resistance. Because of the unique lotus-like micro-structure on the surface of superhydrophobic surface, both the wetting area of the material and the accumulation of capillary bridges are reduced, thus the average friction coefficient of the ice friction surface is reduced. At the same time, the low adhesion reduces the viscosity between the surface and water and prevents the formation of more capillary bridges, which is another important factor affecting the ice friction coefficient. |
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