期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.215503
关键词
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资金
- NSF [CMMI 08 25842]
- University of Pittsburgh [460_05-2008]
- Sandia National Lab.
- U.S. Department of Energy [DE-AC04-94AL85000]
- National Natural Science Foundation of China (NSFC) [50901038]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0928517] Funding Source: National Science Foundation
Bulk metallic glasses are brittle and fail with no plastic strain at room temperature once shear bands propagate. How do metallic glasses deform when the size is less than that of shear bands? Here we show that Al(90)Fe(5)Ce(5) metallic glass with a size <20 nm can be extremely elongated to similar to 200%. Remarkably, even an atomic chain was formed after sample necking, which was never observed in metallic glasses. The unexpected ductility may originate from the fast surface diffusion and the absence of shear band formation, and may guide the development of ductile metallic glasses for engineering applications.
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