Investigation of short-range structural order in Zr_(69.5)Cu_(12)Ni_(11)Al_(7.5) and Zr_(41.5)Ti_(41.5)Ni_(17) glasses, using X-ray absorption spectroscopy and ab initio molecular dynamics simulations

摘要

Short-range order has been investigated in Zr_(69.5)Cu_(12)Ni_(11)Al_(7.5) and Zr_(41.5)Ti_(41.5)Ni_(17) metallic glasses using X-ray absorption spectroscopy and ab initio molecular dynamics simulations. While both of these alloys are good glass formers, there is a difference in their glass-forming abilities (Zr_(41.5)Ti_(41.5)Ni_(17) > Zr_(69.5)Cu_(12)Ni_(11)Al_(7.5)). This difference is explained by inciting the relative importance of strong chemical order, icosahedral content, cluster symmetry and configuration diversity.