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Wettability of High Surface Energy Solid and its Surface Tension Calculation

Shi Li-min

Open publisher page 5 citations

Abstract

The wetting of Au,Ag,Cu,Ge and Sn on the Al_2O_3,SiO_2,ZrO_2 and(0001) basal plane of highly oriented pyrolytic graphite(HOPG) was investigated by sessile drop method under argon mixture CO atmosphere at 1100℃.The contact angles were measured by ADSA software.The surface tensions of four substrates were calculated by new theoretical equation.The results show that the contact angles on the same ceramic surface increase with an increase of liquid metal surface tensions,the solid surface tension calculated with the new theoretical equation is well consistent,which indicates that the establishing theoretical formula can correctly reflect the equilibrium relation of tension among liquid,solid and vapor phases.The average values of surface tension of four substrates mentioned above are 340.24,457.79,357.52,431.35(mJ·m~(-2)) respectively at 1100℃.

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What this paper is about

The wetting of Au,Ag,Cu,Ge and Sn on the Al_2O_3,SiO_2,ZrO_2 and(0001) basal plane of highly oriented pyrolytic graphite(HOPG) was investigated by sessile drop method under argon mixture CO atmosphere at 1100℃.The contact angles were measured by ADSA software.The surface tensions of four substrates were calculated by new theoretical equation.The results show that the contact angles on the same ceramic surface increase with an increase of liquid metal surface tensions,the solid surface tension calculated with the new theoretical equation is well consistent,which indicates that the establishing theoretical formula can correctly reflect the equilibrium relation of tension among liquid,solid and vapor phases.The average values of surface tension of four substrates mentioned above are 340.24,457.79,357.52,431.35(mJ·m~(-2)) respectively at 1100℃.

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Available abstract

The wetting of Au,Ag,Cu,Ge and Sn on the Al_2O_3,SiO_2,ZrO_2 and(0001) basal plane of highly oriented pyrolytic graphite(HOPG) was investigated by sessile drop method under argon mixture CO atmosphere at 1100℃.The contact angles were measured by ADSA software.The surface tensions of four substrates were calculated by new theoretical equation.The results show that the contact angles on the same ceramic surface increase with an increase of liquid metal surface tensions,the solid surface tension calculated with the new theoretical equation is well consistent,which indicates that the establishing theoretical formula can correctly reflect the equilibrium relation of tension among liquid,solid and vapor phases.The average values of surface tension of four substrates mentioned above are 340.24,457.79,357.52,431.35(mJ·m~(-2)) respectively at 1100℃.

Key concepts: Wetting, Surface tension, Materials science, Contact angle, Sessile drop technique, Surface energy, Specific surface energy, Pyrolytic carbon

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