Nanometallic Glasses: Size Reduction Brings Ductility, Surface State Drives Its Extent

We report tensile experiments on Ni80P20 metallic glass samples fabricated via a templated electroplating process and via focused ion beam milling, which differed only in their surface energy states: Ga-ion-irradiated and as-electroplated. Molecular dynamics simulations on similar Ni80Al20 systems c...

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Veröffentlicht in:	Nano letters 2013-09, Vol.13 (9), p.4462-4468
Hauptverfasser:	Chen, D. Z, Jang, D, Guan, K. M, An, Q, Goddard, W. A, Greer, J. R
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum - chemistry Chemical synthesis methods Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Ductile brittle transition Ductility Dynamical systems Electroplating Exact sciences and technology Fracture mechanics Gallium - chemistry Glass - chemistry Ion beams Materials science Metal Nanoparticles - chemistry Methods of nanofabrication Molecular Dynamics Simulation Nanocrystalline materials Nanostructure Nickel - chemistry Physics Radiation effects on specific materials Simulation Structure of solids and liquids crystallography Surface Properties
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Beschreibung
Zusammenfassung:	We report tensile experiments on Ni80P20 metallic glass samples fabricated via a templated electroplating process and via focused ion beam milling, which differed only in their surface energy states: Ga-ion-irradiated and as-electroplated. Molecular dynamics simulations on similar Ni80Al20 systems corroborate the experimental results, which suggest that the transition from brittle to ductile behavior is driven by sample size, while the extent of ductility is driven by surface state.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl402384r