Surface tension of superheated and undercooled liquid Co–Si alloy

Wang, H.P.; Yao, W.J.; Cao, C.D.; Wei, B.
October 2004
Applied Physics Letters;10/18/2004, Vol. 85 Issue 16, p3414
Academic Journal
The surface tension of superheated and undercooled liquid Co 25 wt.% Si alloy was measured by an electromagnetic oscillating drop method. The experimental temperature regime was from 1384 to 2339 K and a maximum undercooling of 223 K (0.14 TL) was achieved. The surface tension of liquid Co 25 wt.% Si alloy is 1.604 Nm-1 at the liquidus temperature of 1607 K, and its temperature coefficient is -4.0×10-4 Nm-1K-1. On the basis of previous research results of pure Co and Si, an expression is developed to predict the surface tension of binary Co–Si alloy system. The other thermophysical properties, such as the viscosity, the solute diffusion coefficient, and the density of liquid Co 25 wt.% Si alloy are also derived by the relevant theoretical models.


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