Aluminium – Chromium – Silicon

Rainer Schmid-Fetzer

Literature Data

Two ternary phases have been seen in a superficial study of the liquidus surface of the Al-corner [1943Mon]. The shape of the liquidus surface was found to be quite different in a more extensive study [1951Pra1] in which primary crystals from slowly cooled alloys were extracted from sectioned samples and studied by chemical and X-ray analysis. In addition, annealing experiments of chill-cast alloys at 550°C for 21 days and some at 559 to 580°C were performed and the microstructures of these and the slowly cooled samples were studied [1951Pra1]. In a follow-up paper [1951Pra2] results are discussed in view of alloying theory. The basic shape of the liquidus surface and the resulting equilibria [1951Pra1] agree qualitatively with a very detailed study of the Al-corner in the range 0 to 5 mass% Cr and 0 to 14 mass% Si by D...