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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Published in | Advanced engineering materials Vol. 16; no. 9; pp. 1098 - 1104 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Blackwell Publishing Ltd
01.09.2014
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Subjects | |
Online Access | Get full text |
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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/sp2CC 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. |
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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 |