Composition reign favored for the formation of CuZrAl amorphous phases investigated by ion beam mixing

Abstract

Cu13Zr40Al47 amorphous phase was obtained in the CuZrAl metallic system by 200keV xenon ion beam mixing (IBM) in the irradiation range of 0.8∼4×1015 Xe+/cm2, clarifying that CuZAl metallic glasses with high concentration of Al could be experimentally obtained. We also found the mixtures of amorphous and crystalline phases newly formed in the Cu7Zr14Al79, Cu16Zr7Al77, Cu27Zr22Al51 and Cu84Zr9Al7 multilayered films. The possible formation mechanism of these resultant alloys is discussed in terms of the atomic collision theory. These experimental results also provide a substantial support to the results of molecular dynamics simulation, which presents a theoretical prediction of metallic glass favored region.