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Published December 14, 1998 | public
Journal Article Open

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


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.

Additional Information

©1998 The American Physical Society Received 1 June 1998 We thank Dr. A. Kleinhammes and L. P. Potter for experimental assistance. This work was supported by the U.S. Army Research Office under Contract No. DAAH04-96-1-0185, the National Science Foundation under Contract No. DMR-9802101, and the Department of Energy under Contract No. DEFG-03-86ER45242.


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