Atomic Scale Mechanisms of Friction Reduction and Wear Protection by Graphene

被引：230

作者：

Klemenz, Andreas ^{[1
,5
]}

Pastewka, Lars ^{[1
,2
]}

Balakrishna, S. G. ^{[3
,4
]}

Caron, Arnaud ^{[3
]}

Bennewitz, Roland ^{[3
,4
]}

Moseler, Michael ^{[1
,5
]}

机构：

[1] Fraunhofer Inst Mech Mat IWM, D-79108 Freiburg, Germany

[2] Karlsruhe Inst Technol, Inst Appl Mat, D-76131 Karlsruhe, Germany

[3] INM Leibniz Inst New Mat, D-66123 Saarbrucken, Germany

[4] Univ Saarland, Dept Phys, D-66123 Saarbrucken, Germany

[5] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

来源：

NANO LETTERS | 2014年 / 14卷 / 12期

关键词：

Graphene; friction; nanoindentation; nanoscratch; rupture; wear protection; DIAMOND; VAPOR; LUBRICANT; SHEETS; FILMS;

D O I：

10.1021/nl5037403

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study nanoindentation and scratching of graphene-covered Pt(111) surfaces in computer simulations and experiments. We find elastic response at low load, plastic deformation of Pt below the graphene at intermediate load, and eventual rupture of the graphene at high load. Friction remains low in the first two regimes, but jumps to values also found for bare Pt(111) surfaces upon graphene rupture. While graphene substantially enhances the load carrying capacity of the Pt substrate, the substrates intrinsic hardness and friction are recovered upon graphene rupture.

引用

页码：7145 / 7152

页数：8

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