Crystalline monolayer surface of liquid Au-Cu-Si-Ag-Pd: Metallic glass former

Journal Article · Mon Feb 06 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3599515· OSTI ID:1028500

Mechler, S; Yahel, E; Pershan, P S; Meron, M; Lin, B ^[1]

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1. Harvard

It is demonstrated by means of x-ray synchrotron reflectivity and diffraction that the surface of the liquid phase of the bulk metallic glass forming alloy Au₄₉Cu_26.9Si_16.3Ag_5.5Pd_2.3 consists of a two-dimensional crystalline monolayer phase for temperatures of up to about 50 K above the eutectic temperature. The present alloy as well as glass forming Au₈₂Si₁₈ and Au-Si-Ge alloys containing small amounts of Ge are the only metallic liquids to exhibit surface freezing well above the melting temperature. This suggests that the phenomena of surface freezing in metallic liquids and glass forming ability are related and probably governed by similar physical properties.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: DOE - BASIC ENERGY SCIENCES
• OSTI ID: 1028500
• Journal Information: Applied Physics Letters, Vol. 98, Issue (25) ; 06, 2011; ISSN 0003-6951
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
DIFFRACTION
EUTECTICS
FREEZING
GLASS
MELTING
PHYSICAL PROPERTIES
REFLECTIVITY
SYNCHROTRONS