SURFACE TENSION OF LIQUID IRON-NICKEL-CHROMIUM ALLOY SYSTEM.

Abstract

Surface tension of liquid binary and ternary iron alloys containing Cr from 0 to 40% and Ni from 0 to 100% was measured by the sessile drop method at temperatures up to 1600 degree C. Surface tension of Fe-Ni alloys decreased linearly with temperature except for an alloy containing 60 at% Ni, where the temperature coefficient of surface tension was positive. Addition of Ni up to 60 at% leads to the decrease of surface tension of iron, but its further addition to the slight increase. Surface tension of the ternary alloys was determined mainly by the chromium content and the effect of nickel was very small.