Anomalous Behavior of Load-Dependent Friction on Ultra-Nanocrystalline Diamond Film

Load dependent anomalous behavior of friction coefficient in ultra‐nanocrystalline diamond (UNCD) film was investigated while sliding against SiC ball. At low and high loads, the friction coefficient was quite high. However, at intermediate loads, ultra‐ low friction coefficient 0.002 was measured....

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Bibliographic Details
Published inAdvanced engineering materials Vol. 16; no. 9; pp. 1098 - 1104
Main Authors Radhika, Ramadoss, Kumar, Niranjan, Dash, Sitaram, Tyagi, Ashok K., Lin, I-Nan
Format Journal Article
LanguageEnglish
Published Blackwell Publishing Ltd 01.09.2014
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Summary:Load dependent anomalous behavior of friction coefficient in ultra‐nanocrystalline diamond (UNCD) film was investigated while sliding against SiC ball. At low and high loads, the friction coefficient was quite high. However, at intermediate loads, ultra‐ low friction coefficient 0.002 was measured. Raman analysis of sliding interfaces showed evolution of high fraction of a‐C/sp2CC bonding at low and high loads. This invariably results in occurrences of unsaturated carbon atoms which chemically forms strong bonding. However, wear rate does not follow the trend of friction coefficient and found to increase with load. Such a behavior indicates that friction coefficient depends on the nature of chemical bonding present at sliding interfaces. Load‐dependent anomalous behavior of friction coefficient in ultra‐nanocrystalline diamond (UNCD) film is investigated while sliding against SiC ball. At low and high loads, the magnitude of friction coefficient is high. However, at intermediate loads, ultra‐low friction coefficient 0.002 is measured. Load‐dependent friction behavior is explained by chemical nature of sliding surfaces and development of transferlayer.
Bibliography:istex:6D3EFD1C9C3E2F0711897865834FB8C7F21FE5F0
ark:/67375/WNG-3SNJFTVX-D
ArticleID:ADEM201300515
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.201300515