Viscosities and their correlations with structures of Cu-Ag melts

doi:10.1088/1674-1056/24/9/096601

Abstract The viscosities of a series of Cu-Ag melts in a temperature range from 1473 K to nearly liquid temperatures are measured by using an oscillating viscometer. At the same temperature, the value of viscosity increases first with silver content increasing, and reaches a maximum value at the eutectic component Cu₄₀Ag₆₀, then decreases. All the temperature dependences of the viscosities of Cu-Ag melts conform with the Arrhenius equation. The parameters of correlation length D of the studied Cu-Ag melts are calculated according to the experimental results of x-ray diffraction. The temperature dependence of correlation length D shows an exponential decay function, which is similar to the Arrhenius equation. Based on the values of viscosities and correlation length D, a direct correlation between viscosity and liquid structure is found for the investigated Cu-Ag melts through comparative analysis.

Keywords: viscosity liquid structure correlation length

Received: 04 September 2014
Revised: 27 January 2015
Accepted manuscript online:

PACS:	66.20.Ej	(Studies of viscosity and rheological properties of specific liquids)
	61.05.cp	(X-ray diffraction)
	61.25.Mv	(Liquid metals and alloys)
	66.20.Cy	(Theory and modeling of viscosity and rheological properties, including computer simulation)

Fund: Project supported by the Science and Technology Development Program of Shandong Province, China (Grant No. 2011YD03099) and the Natural Science Foundation of Shandong Province, China (Grant No. ZR2014EL001).

Corresponding Authors: Zhao Yan
E-mail: dzuzhy@126.com

Cite this article:

Zhao Yan (赵岩), Hou Xiao-Xia (侯晓霞) Viscosities and their correlations with structures of Cu-Ag melts 2015 Chin. Phys. B 24 096601

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