Slow atomic motion in Zr-Ti-Cu-Ni-Be metallic glasses studied by NMR

被引：76

作者：

Tang, XP ^{[1
]}

Busch, R

Johnson, WL

Wu, Y

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[2] CALTECH, Keck Lab Engn Mat, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.81.5358

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：5358 / 5361

页数：4

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