日本金属学会誌

J. Japan Inst. Metals, Vol. 50, No. 12 (1986),
pp. 1068-1074

Effects of Aluminum and Nickel on the Activity of Zinc in Molten Copper

Shigeaki Sugino1 and Hisato Hagiwara2

1College of Engineering, University of Osaka Prefecture, Sakai
2Emeritus Professor of University of Osaka Prefecture\address{}

Abstract:

The activities of Zn in liquid Cu-Zn-X (X=Al, Ni) ternary alloys have been measured by the use of isopiestic method at temperatures 1423 K and 1373 K and in the composition range, NZn<0.09 and NX≤0.08. From the activity data the first and second order interaction parameters between Zn and X in molten Cu have been determined. The activity of Zn in Cu-Zn binary liquid alloys is increased by the addition of a small amount of Al and decreased by Ni. The activity coefficients of Zn in Cu-Zn-X ternary liquid alloys are well expressed by a quadratic relation,
ln γ Zn=ln γ Zn°+ ε ZnZnNZn+ ε ZnXNXZnZnNZn2ZnXNX2ZnZnXNZnNX, in the composition range, NZn+NX≤0.10.
It has been demonstrated that the quadratic formalism proposed by Darken is valid for Cu-Zn-Al ternary liquid alloys in the composition range, NZn≤0.08 and NAl≤0.06.


(Received 1986/6/2)

Keywords:

activity of zinc, copper-zinc-aluminum alloy, copper-zinc-nickel alloy, dilute solution, interaction parameter, isopiestic method, quadratic formalism, Wagner's relation


PDF(Free)PDF (Free)     Table of ContentsTable of Contents

Please do not copy without permission.