Strengthening effect of single-atomic-layer graphene in metal-graphene nanolayered composites

被引：644

作者：

Kim, Youbin ^{[1
]}

Lee, Jinsup ^{[2
]}

Yeom, Min Sun ^{[3
,4
]}

Shin, Jae Won ^{[5
]}

Kim, Hyungjun ^{[1
]}

Cui, Yi ^{[6
]}

Kysar, Jeffrey W. ^{[7
]}

Hone, James ^{[7
]}

Jung, Yousung ^{[1
,8
]}

Jeon, Seokwoo ^{[2
,8
,9
]}

Han, Seung Min ^{[1
,8
]}

机构：

[1] Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

[3] KISTI, SMB Knowledge Support Ctr, Ind Supercomp Dept, Taejon 305806, South Korea

[4] Northwestern Univ, Mat Res Sci & Engn Ctr, Evanston, IL 60208 USA

[5] Korea Basic Sci Inst, Div Electron Microscop Res, Taejon 305333, South Korea

[6] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[7] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

[8] Korea Adv Inst Sci & Technol, KI NanoCentury, Taejon 305701, South Korea

[9] Korea Adv Inst Sci & Technol, KI NanoCentury, Graphene Res Ctr, Taejon 305701, South Korea

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

基金：

新加坡国家研究基金会;

关键词：

MECHANISMS; INTERFACES; SCALE; NANOCOMPOSITES; MULTILAYERS; DISPERSION; GRAPHITE; DYNAMICS;

D O I：

10.1038/ncomms3114

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Graphene is a single-atomic-layer material with excellent mechanical properties and has the potential to enhance the strength of composites. Its two-dimensional geometry, high intrinsic strength and modulus can effectively constrain dislocation motion, resulting in the significant strengthening of metals. Here we demonstrate a new material design in the form of a nanolayered composite consisting of alternating layers of metal (copper or nickel) and monolayer graphene that has ultra-high strengths of 1.5 and 4.0 GPa for copper-graphene with 70-nm repeat layer spacing and nickel-graphene with 100-nm repeat layer spacing, respectively. The ultra-high strengths of these metal-graphene nanolayered structures indicate the effectiveness of graphene in blocking dislocation propagation across the metal-graphene interface. Ex situ and in situ transmission electron microscopy compression tests and molecular dynamics simulations confirm a build-up of dislocations at the graphene interface.

引用

页数：7

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