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Nanolaminate of metallic glass and graphene with enhanced elastic modulus, strength, and ductility in tension

Author(s)
Park, Sun-YoungGwak, Eun-JiHuang, MingRuoff, Rodney S.Kim, Ju-Young
Issued Date
2017-10
DOI
10.1016/j.scriptamat.2017.06.031
URI
https://scholarworks.unist.ac.kr/handle/201301/22366
Fulltext
http://www.sciencedirect.com/science/article/pii/S1359646217303445
Citation
SCRIPTA MATERIALIA, v.139, pp.63 - 66
Abstract
We fabricate a nanolaminate by repeated co-sputter deposition of a 60 nm-thick Cu50Zr50 metallic glass layer alternating with transfer of graphene. In situ micro-tensile tests reveal that the addition of a very small fraction (0.46 vol%) of graphene in the nanolaminate improve the elastic modulus and yield strength of the nanolaminate by 9.6% and 14%, respectively, comparing with those of the 360 nm-thick monolithic Cu50Zr50 metallic glass. The nanolaminate also show enhanced tensile ductility: an ultimate tensile strength of 2.23 GPa and fracture strain of 539% were attained by strain-hardening after yielding at 1.98 GPa stress and 3.69% strain.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
ISSN
1359-6462
Keyword (Author)
GrapheneMetallic glassMultilayers thin filmsSputteringTension test
Keyword
UNIAXIAL TENSIONROOM-TEMPERATURESIZENANOPILLARSBEHAVIORNECKINGFILMS

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