Influence of environmental parameters on the frictional behavior of DLC coatings

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In a previous studies it was shown that diamond like carbon (DLC) films possess low friction coefficient (f) and excellent wear resistance. The reduction in f was found to be consistent with a ``wear induced graphitization`` mechanism of the DLC structure. A recent study showed that operational parameters (sliding velocity and loading level) influence the tribological behavior of DLC film through control of the kinetics of the graphitization process. The objective of the present study was to investigate the influence of environmental parameters (humidity and temperature) on the tribological behavior of DLC film and provide further support to the wear ... continued below

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20 p.

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Liu, Y.; Erdemir, A. & Meletis, E.I. May 1, 1997.

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  • Liu, Y. Louisiana State Univ., Baton Rouge, LA (United States). Mechanical Engineering Dept.
  • Erdemir, A.
  • Meletis, E.I. Argonne National Lab., IL (United States). Energy Technology Div.

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Description

In a previous studies it was shown that diamond like carbon (DLC) films possess low friction coefficient (f) and excellent wear resistance. The reduction in f was found to be consistent with a ``wear induced graphitization`` mechanism of the DLC structure. A recent study showed that operational parameters (sliding velocity and loading level) influence the tribological behavior of DLC film through control of the kinetics of the graphitization process. The objective of the present study was to investigate the influence of environmental parameters (humidity and temperature) on the tribological behavior of DLC film and provide further support to the wear induced graphitization mechanism. Ion beam deposition was utilized to deposit DLC on a SiC substrate. Pin-on-disc experiments were conducted by varying humidity (0%, 40% and 100%) and temperature ({minus}10 C and 25 C). As-deposited DLC and wear debris was characterized by transmission electron microscopy. It was found that lower humidity increases the graphitization rate more than likely due to the reduction in the effect by the water molecules. A decreased graphitization rate was observed at lower temperature and higher humidity and can be attributed to suppression of temperature rise at hot spots. The present findings are consistent with and further verify the wear induced graphitization mechanism.

Physical Description

20 p.

Notes

OSTI as DE97053383

Source

  • 24. international conference on metallurgical coatings and thin films (ICMCTF-24) and exhibition, San Diego, CA (United States), 21-25 Apr 1997

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  • Other: DE97053383
  • Report No.: ANL/EP/CP--93444
  • Report No.: CONF-970488--
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/634091 | External Link
  • Office of Scientific & Technical Information Report Number: 634091
  • Archival Resource Key: ark:/67531/metadc691262

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  • May 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 15, 2015, 5:19 p.m.

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Liu, Y.; Erdemir, A. & Meletis, E.I. Influence of environmental parameters on the frictional behavior of DLC coatings, report, May 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc691262/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.