Tribology of coated surfaces

The joint network meeting the 4th of September will feature a talk from VTT Technical Research Center of Finland by Helena Ronkainen on the subject: 

Tribology of coated surfaces

Coatings are widely used to reduce friction and wear of components in modern engineering applications. In order to evaluate the tribological performance of coated surfaces tribological model tests or application oriented tests can be carried out. Tribological testing allows to compare different coatings, and enables to specificy e.g. the requirements for the surface finish to provide optimal performance for the application. For example, surface roughness has an effect on the contact conditions and contact pressures generated in sliding or rolling contacts and thus influence the performance of coated surface. In this presentation, the principles of tribological evaluation are presented, and as an example, the influence of surface roughness on coating performance will be reviewed based on experimental and modelling results.

 
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