- Tytuł:
- Wettability of Ceramic Substrates by Silver Based Alloys
- Autorzy:
-
Weltsch, Z.
Lovas, A. - Powiązania:
- https://bibliotekanauki.pl/articles/1399512.pdf
- Data publikacji:
- 2013-07
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 68.08.Bc
- Opis:
- The temperature dependence of wettability (wetting angle, Θp(T)) for Ag-based melts on graphite and $Al_2O_3$ 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. The effect is also supported by the calculations based on the rigid band model, and is also in qualitative agreement with the Hume-Rothery rules. Nevertheless, the effects are partially smeared by other (metallurgical) factors, like the interaction between the oxygen-alloying elements and by the graphite substrate-oxygen interaction. In contrast, such effects are not pronounced in the case of $Al_2O_3$ substrates. As a consequence, Θp(T) exhibits an opposite trend in the case of two substrates. Crossovers of the Θp(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.
- Źródło:
-
Acta Physica Polonica A; 2013, 124, 1; 78-87
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł