Surface Tension of Bimetallic Composites
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| Format: | Recurso digital |
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2016
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| _version_ | 1866901223569883136 |
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| author | Astrid Müller Elianore Quasar |
| author_facet | Astrid Müller Elianore Quasar |
| contents | <p>—The temperature dependence of wettability (wetting angle, Θ (T)) for Ag-based melts on graphite and Al2O3 substrates is compared. Typical alloying effects are found, as the Ag host metal is gradually replaced by various metallic elements. The essence of alloying lies in the change of the electron/atom (e/a) ratio. This ratio is also manifested in the shift of wetting angles on the same substrate. Nevertheless, the effects are partially smeared by other (metallurgical) factors, like the interaction between the oxygenalloying elements and by the graphite substrate-oxygen interaction. In contrast, such effects are not pronounced in the case of Al2O3 substrates. As a consequence, Θ(T) exhibits an opposite trend in the case of two substrates. Crossovers of the Θ(T) curves were often found. The positions of crossovers depend on the chemical character and concentration of solute atoms. Segregation and epitaxial texture formation after solidification were also observed in certain alloy drops, especially in high concentration range. This phenomenon is not yet explained in every detail</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19448570 |
| institution | Zenodo |
| language | |
| publishDate | 2016 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Surface Tension of Bimetallic Composites Astrid Müller Elianore Quasar —contact angle graphite silver soldering solid solubility substrate temperature dependence wetting. <p>—The temperature dependence of wettability (wetting angle, Θ (T)) for Ag-based melts on graphite and Al2O3 substrates is compared. Typical alloying effects are found, as the Ag host metal is gradually replaced by various metallic elements. The essence of alloying lies in the change of the electron/atom (e/a) ratio. This ratio is also manifested in the shift of wetting angles on the same substrate. Nevertheless, the effects are partially smeared by other (metallurgical) factors, like the interaction between the oxygenalloying elements and by the graphite substrate-oxygen interaction. In contrast, such effects are not pronounced in the case of Al2O3 substrates. As a consequence, Θ(T) exhibits an opposite trend in the case of two substrates. Crossovers of the Θ(T) curves were often found. The positions of crossovers depend on the chemical character and concentration of solute atoms. Segregation and epitaxial texture formation after solidification were also observed in certain alloy drops, especially in high concentration range. This phenomenon is not yet explained in every detail</p> |
| title | Surface Tension of Bimetallic Composites |
| topic | —contact angle graphite silver soldering solid solubility substrate temperature dependence wetting. |
| url | https://doi.org/10.5281/zenodo.19448570 |