Melting behaviour of nickel—chromium—silicon alloys

Abstract

With regard to developing low melting NiCrSi alloys used as joint materials in high temperature brazing technics, especially in reactor technique, the melting behaviour of nickel—rich NiCrSi alloys was investigated systematically by differential thermal analysis. The dependence of the liquidus temperatures on alloying concentration ranges from 0 to 28 at. -% Si and 0 to 60 at.-% Cr shows a ternary eutectic melting temperature minimum of 1077°C at 20 at.-% Cr and 21.3 at.-% Si. The melting behaviour of the alloys in the indicated concentration range will be characterized in a reaction scheme. The dependence on temperature of the solubility of Si and Cr in Ni will be discussed.