Atomic diffusion in the supercooled liquid and glassy states of the Zr{sub 41.2}Ti{sub 13.8}Cu{sub 12.5}Ni{sub 10}Be{sub 22.5} alloy

Journal Article · Mon Sep 18 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.2364· OSTI ID:239434

Geyer, U; Schneider, S; Johnson, W L ^[1]; Qiu, Y; Tombrello, T A ^[2]; Macht, M ^[3]

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1. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125 (United States)
2. Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125 (United States)
3. Hahn-Meitner-Institut Berlin, Abt. Strukturforschung, 14109 Berlin (Germany)

The self-diffusivity of Be in the bulk metallic amorphous alloy Zr{sub 41.2}Ti{sub 13.8}Cu{sub 12.5}Ni{sub 10}Be{sub 22.5} is investigated. Below the glass transition temperature the data suggest a single atomic jump diffusion behavior of Be. By taking into account the change in configurational entropy due to the glass transition, we explain the mechanism for diffusion of Be in the supercooled liquid state (i.e., above the glass transition) of Zr{sub 41.2}Ti{sub 13.8}Ni{sub 10}Cu{sub 12.5}Be{sub 22.5} by single atomic jumps in a slowly changing configuration of neighboring atoms.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• DOE Contract Number: FG03-86ER45242
• OSTI ID: 239434
• Journal Information: Physical Review Letters, Vol. 75, Issue 12; Other Information: PBD: 18 Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BERYLLIUM ALLOYS
SELF-DIFFUSION
COPPER ALLOYS
NICKEL ALLOYS
TITANIUM ALLOYS
ZIRCONIUM ALLOYS
METALLIC GLASSES
PHASE TRANSFORMATIONS
SUBCOOLING
TEMPERATURE DEPENDENCE