Research on Zr 50Al 15− xNi 10Cu 25Y x amorphous alloys prepared by mechanical alloying with commercial pure element powders

Abstract

Amorphous Zr 50Al 15− x Ni 10Cu 25Y x alloy powders were fabricated by mechanical alloying at low vacuum with commercial pure element powders. The effects on glass forming ability of Al partial substituted by Y in Zr 50Al 15Ni 10Cu 25 and thermal stability of Si 3N 4 powders addition were investigated. The as-milled powders were characterized by X-ray diffraction, scanning electron microscopy and differential scanning calorimeter. The results show that partial substitution of Al can improve the glass forming ability of Zr 50Al 15Ni 10Cu 25 alloy. Minor Si 3N 4 additions raise the crystallization activation energy of the amorphous phase and thus improve its thermal stability.