Features of the Al90Y10 alloy structure during solidification under high pressure

Abstract Using the methods of durametry, X-ray structural analysis, optical and electronic microscopy, we have compared the structures of the Al90Y10 hypereutectic alloy (hereinafter at.% is given) obtained at the atmospheric pressure and that produced with quick cooling under pressure of 9 GPa. It has been demonstrated that, in both cases, the crystalline phases of α-Al and Al3Y get formed 1 . Using high pressure, we have provided a dense homogeneous alloy structure with abnormally α-Al-supersaturated solid solution and finely divided aluminides in metastable eutectics with high hardness.