Details

Autor(en) / Beteiligte

• Konicek, A R
• Grierson, D S
• Gilbert, P U P A
• Sawyer, W G
• Sumant, A V
• Carpick, R W

Titel

Origin of ultralow friction and wear in ultrananocrystalline diamond

Ist Teil von

• Physical review letters, 2008-06, Vol.100 (23), p.235502-235502, Article 235502

Ort / Verlag

United States

Erscheinungsjahr

2008

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.