Evaluation of unusual change in contact angle between MgO and molten magnesium
| Autor: | Shun Izutani, Shoji Kiguchi, Kiyoshi Nogi, Taihei Matsumoto, Hidetoshi Fujii |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Vapor pressure Magnesium Mechanical Engineering technology industry and agriculture Evaporation Mineralogy chemistry.chemical_element Condensed Matter Physics Contact angle Sessile drop technique chemistry Mechanics of Materials General Materials Science sense organs Wetting Composite material Volume loss |
| Zdroj: | Materials Science and Engineering: A. 417:99-103 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2005.10.055 |
| Popis: | The wetting of MgO by molten magnesium was measured between 973 and 1273 K using an improved sessile drop method. In this method, molten magnesium was set around the sample droplet to prevent oxidation of the magnesium droplet. A significant volume loss of the droplet was observed over 1073 K due to the high vapor pressure, and the contact angle was underwent an unusual change over 1173 K. The contact angle first decreased and then increased. This phenomenon occurred due to the pinning of the three-phase line at deep ditch. This change in the contact angle is an apparent change in contact angle. The intrinsic contact angle should be decided using the initial value or the maximum value just before the disappearance of the droplet. For any high vapor pressure system, such a change in contact angle can be observed at high temperatures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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