TY - JOUR
T1 - Surface tension of molten Ag-Sn and Au-Cu alloys at different oxygen partial pressures
AU - Min, Soonki
AU - Lee, Joonho
PY - 2009
Y1 - 2009
N2 - A semi-empirical method to estimate the surface tension of molten alloys at different oxygen partial pressures is suggested in this study. The surface tension of molten Ag-Sn and Ag-Cu alloys were calculated using the Butler equation with the surface tension value of pure substance at a given oxygen partial pressure. The oxygen partial pressure ranges were 2.86 × 10-12 - 1.24 × 10-9 Pa for the Ag-Sn system and 2.27 × 10-11 - 5.68 × 10-4 Pa for the Ag-Cu system. In this calculation, the interactions of the adsorbed oxygen with other metallic constituents were ignored. The calculated results of the Ag-Sn alloys were in reasonable accordance with the experimental data within a difference of 8%. For the Ag-Cu alloy system at a higher oxygen partial pressure, the surface tension initially decreased but showed a minimum at XAg = 0.05 to increase as the silver content increased. This behavior appears to be related to the oxygen adsorption and the corresponding surface segregation of the constituent with a lower surface tension. Nevertheless, the calculated results of the Ag-Cu alloys with the present model were in good agreement with the experimental data within a difference of 10%.
AB - A semi-empirical method to estimate the surface tension of molten alloys at different oxygen partial pressures is suggested in this study. The surface tension of molten Ag-Sn and Ag-Cu alloys were calculated using the Butler equation with the surface tension value of pure substance at a given oxygen partial pressure. The oxygen partial pressure ranges were 2.86 × 10-12 - 1.24 × 10-9 Pa for the Ag-Sn system and 2.27 × 10-11 - 5.68 × 10-4 Pa for the Ag-Cu system. In this calculation, the interactions of the adsorbed oxygen with other metallic constituents were ignored. The calculated results of the Ag-Sn alloys were in reasonable accordance with the experimental data within a difference of 8%. For the Ag-Cu alloy system at a higher oxygen partial pressure, the surface tension initially decreased but showed a minimum at XAg = 0.05 to increase as the silver content increased. This behavior appears to be related to the oxygen adsorption and the corresponding surface segregation of the constituent with a lower surface tension. Nevertheless, the calculated results of the Ag-Cu alloys with the present model were in good agreement with the experimental data within a difference of 10%.
KW - Molten alloy
KW - Oxygen partial pressure
KW - Surface tension
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U2 - 10.3740/MRSK.2009.19.1.013
DO - 10.3740/MRSK.2009.19.1.013
M3 - Article
AN - SCOPUS:68649121426
VL - 19
SP - 13
EP - 17
JO - Korean Journal of Materials Research
JF - Korean Journal of Materials Research
SN - 1225-0562
IS - 1
ER -