Frictional behavior of extremely smooth and hard solids

Dae Eun Kim, N. P. Suh

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Frictional behavior of extremely smooth (average roughness ~1 nm) and hard (approximately 800-2200 kg mm-2) solids in air has been investigated. The present study was conducted to obtain the minimum friction under dry sliding conditions by eliminating the friction components due to mechanical interactions such as plowing and asperity deformation. By using extremely smooth and hard materials (silicon, sapphire, SiC, quartz and glass), static friction coefficients as low as 0.06 and steady state friction coefficients between 0.09 and 0.17 could be obtained with an undetectable amount of wear. The low friction and wear behavior of smooth and hard solids in air is attributed to the low probability of asperity interaction and wear particle generation as well as to surface films. Even for such low factional interaction, plastic deformation is still the major cause of friction in crystalline systems, as suggested by the existence of dislocation etch pits on silicon surfaces along the sliding track.

Original languageEnglish
Pages (from-to)873-879
Number of pages7
JournalWear
Volume162-164
Issue numberPART B
DOIs
Publication statusPublished - 1993 Apr 13

Fingerprint

friction
Friction
coefficient of friction
sliding
Wear of materials
Silicon
plowing
static friction
air
interactions
silicon
plastic deformation
sapphire
Quartz
roughness
quartz
Aluminum Oxide
Air
Sapphire
glass

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Kim, Dae Eun ; Suh, N. P. / Frictional behavior of extremely smooth and hard solids. In: Wear. 1993 ; Vol. 162-164, No. PART B. pp. 873-879.
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Frictional behavior of extremely smooth and hard solids. / Kim, Dae Eun; Suh, N. P.

In: Wear, Vol. 162-164, No. PART B, 13.04.1993, p. 873-879.

Research output: Contribution to journalArticle

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