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Fretting wear studies on diamond-like carbon coated Ti-6Al-4V
Published in
2009
Volume: 203
   
Issue: 9
Pages: 1205 - 1212
Abstract
This work is concerned with the performance of diamond-like carbon (DLC) coated Ti-6Al-4V flat samples fretted against alumina ball in two environments-ambient air and simulated body fluid (Ringer solution). Hydrogenated DLC (H-DLC) coatings were prepared by radio frequency plasma enhanced chemical vapour deposition process. Raman scattering measurements were done on the coatings. Fretting wear tests were conducted at different normal loads using a fretting wear test rig working on scotch yoke mechanism. Wear scars on the tested specimens were observed using an optical microscope. Wear volume was calculated based on wear scar diameter measured along parallel and perpendicular to the fretting direction. Tangential force coefficient (TFC) values exhibited by DLC coated samples were lower than those exhibited by uncoated specimens in both ambient air and Ringer solution. Very low TFC values and low wear volume were observed for H-DLC coated samples tested in air at lower loads of 1.9 N and 4.9 N. It was attributed to occurrence of graphitisation and formation of transfer layer on alumina ball. © 2008 Elsevier B.V. All rights reserved.
About the journal
JournalSurface and Coatings Technology
ISSN02578972
Open AccessNo
Concepts (32)
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    Air
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    Aluminum
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    FRETTING CORROSION
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    Friction
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    Graphite
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    Plasma deposition
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    Plasma enhanced chemical vapor deposition
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    Titanium alloys
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    Tribology
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    ALUMINA BALLS
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    AMBIENT AIRS
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    Chemical vapour deposition
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    COATED SAMPLES
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    DIAMOND-LIKE CARBON
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    Fretting
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    FRETTING WEAR TESTS
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    FRETTING WEARS
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    HYDROGENATED DLC
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    NORMAL LOADS
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    Optical microscopes
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    Radio frequencies
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    RINGER SOLUTIONS
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    SCATTERING MEASUREMENTS
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    SCOTCH YOKES
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    Simulated body fluids
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    TANGENTIAL FORCE COEFFICIENTS
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    Ti-6al-4v
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    Transfer layers
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    WEAR SCAR DIAMETERS
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    WEAR SCARS
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    WEAR VOLUMES
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    Diamonds