Regardless of environment (ultrahigh vacuum, humid air, dry nitrogen, or water), ion-beam-deposited diamondlike carbon (DLC) and nitrogen-ion-implanted, chemical-vapor-deposited (CVD) diamond films had low steady-state coefficients of friction (<0.1) and low wear rates (≤ 10−6 mm3/N·m). These films can be used as effective wear-resistant, self-lubricating coatings regardless of environment. On the other hand, as-deposited, fine-grain CVD diamond films; polished, coarse-grain CVD diamond films; and polished and then fluorinated, coarse-grain CVD diamond films can be used as effective wear-resistant, self-lubricating coatings in humid air, in dry nitrogen, and in water, but they had a high coefficient of friction and a high wear rate in ultrahigh vacuum. The polished, coarse-grain CVD diamond film revealed an extremely low wear rate, far less than 10−10 mm3/N·m, in water.
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April 1998
Research Papers
Lubrication by Diamond and Diamondlike Carbon Coatings
Kazuhisa Miyoshi
Kazuhisa Miyoshi
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH 44135
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Kazuhisa Miyoshi
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH 44135
J. Tribol. Apr 1998, 120(2): 379-384 (6 pages)
Published Online: April 1, 1998
Article history
Received:
November 21, 1996
Revised:
May 26, 1997
Online:
January 24, 2008
Citation
Miyoshi, K. (April 1, 1998). "Lubrication by Diamond and Diamondlike Carbon Coatings." ASME. J. Tribol. April 1998; 120(2): 379–384. https://doi.org/10.1115/1.2834437
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