Origin of ultralow friction and wear in ultrananocrystalline diamond

被引：214

作者：

Konicek, A. R. ^{[1
]}

Grierson, D. S. ^{[2
]}

Gilbert, P. U. P. A. ^{[3
]}

Sawyer, W. G. ^{[4
]}

Sumant, A. V. ^{[5
]}

Carpick, R. W. ^{[6
]}

机构：

[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[2] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

[3] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[4] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA

[5] Ctr Nanoscale Mat, Argonne Natl Lab, Argonne, IL 60439 USA

[6] Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.100.235502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The impressively low friction and wear of diamond in humid environments is debated to originate from either the stability of the passivated diamond surface or sliding-induced graphitization/rehybridization of carbon. We find ultralow friction and wear for ultrananocrystalline diamond surfaces even in dry environments, and observe negligible rehybridization except for a modest, submonolayer amount under the most severe conditions (high load, low humidity). This supports the passivation hypothesis, and establishes a new regime of exceptionally low friction and wear for diamond.

引用

页数：4

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