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Method and surface roughness aspects for the design of DLC coatings
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.ORCID iD: 0000-0002-2578-9453
2006 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 261, no 1, 107-111 p.Article in journal (Refereed) Published
Abstract [en]

The design of coatings for highly loaded component contacts, such as bearings, gears and valve train components involves several important factors, including load, friction, lubrication, surface characteristics and material parameters. This paper presents an investigation of the influence of the material, coating thickness and surface roughness on tensional stress levels for coatings that are more compliant than the substrate material. Specifically the effect of multiple asperity contact is studied in three dimensions. The simulation is based on a finite element model where the load is applied as several interacting Hertzian pressure distributions. The results show that the surface structure, in combination with the elastic properties of the coating, has a large influence on the tensional stress level in the coating. The highest tensional stress level in the coating occurs when contact spots almost overlap neighbouring cells and at the same time the size of the contact spots is in the same order of magnitude as the coating thickness.

Place, publisher, year, edition, pages
2006. Vol. 261, no 1, 107-111 p.
Keyword [en]
design of DLC coatings, surface roughness aspects, diamond-like carbon coatings
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-15830DOI: 10.1016/j.wear.2005.09.029ISI: 000238856200017Scopus ID: 2-s2.0-33745119403OAI: oai:DiVA.org:kth-15830DiVA: diva2:333872
Note

QC 20100525 QC 20110927

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Björklund, Stefan

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