Slow Atomic Motion in Zr-Ti-Cu-Ni-Be Metallic Glasses Studied by NMR

Journal Article · Tue Dec 01 00:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.5358· OSTI ID:675128

Tang, X; Wu, Y ^[1]; Busch, R; Johnson, W L ^[2]

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1. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)
2. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125 (United States)

Nuclear magnetic resonance is used for the first time to detect slow atomic motion in metallic glasses, specifically, Be motion in Zr-Ti-Cu-Ni-Be bulk metallic glasses. The observations are not consistent with the vacancy-assisted and interstitial diffusion mechanisms and favor the spread-out free volume fluctuation mechanism for Be diffusion. Comparison with the results of Be diffusion measured by elastic backscattering the NMR results also indicates that the energy barriers for short- and long-range Be motion are the same. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• DOE Contract Number: FG03-86ER45242
• OSTI ID: 675128
• Journal Information: Physical Review Letters, Vol. 81, Issue 24; Other Information: PBD: Dec 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ENTHALPY
METALLIC GLASSES
ZIRCONIUM ALLOYS
TITANIUM ALLOYS
COPPER ALLOYS
NICKEL ALLOYS
BERYLLIUM ALLOYS
NMR SPECTRA
DIFFUSION
INTERSTITIALS
VACANCIES
ELASTIC SCATTERING