Does Ag metal have certain surface tension at the temperature below melting point, such as 800-955℃? Or is there a creep behaviour with T increase?
Dear Xinfang, all solid-air or liquid-air surfaces involve a surface tension or surface energy. Otherwise the equilibrium state will be gaseous and not solid or liquid (taking into consideration also correction for entropy and Gibbs Free energy).
A study of the increase of energy of the electronic states on the surface vs those of the bulk in Cu was in my Ph. D. thesis
https://www.educacion.gob.es/teseo/mostrarRef.do?ref=144267
In this sense Ag is quite similar to Cu.
However, surface tension is a property of the interface -not just of one side-.
For example, for the case of water it depends on the vapor present (humidity)
Article The effect of the partial pressure of water vapor on the sur...
Moreover, the effect of the the vapor phase can shift the melting point.
Article Ice Surface Entropy Induction by Humidity or How Humidity Pr...
Article Surface freezing of water
Actually I found dispersed Ag powders are tend to agglomerate at lower tem such as 880℃, 900℃, even through there are some glass phase to segregate Ag powders. I can’t figure it out.
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