Project Details
Projekt
FOR 576: Micro Structuring of Thermomechanically High Stressed Surfaces
Subject Area
Mechanical and Industrial Engineering
Term
from 2006 to 2015
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 5471656
In the consequence of high power transmission at reduced installation size, today functional surfaces are exposed to increasing thermal, mechanical as well as tribological loads. Constructive methods and the application of suitable new materials, coatings and lubricants cannot fully accomplish these enhanced demands satisfactory. In this case the surface functionalisation via micro structuring gives an innovative alternative to adjust tribological properties.
Micro structuring of highly loaded surface areas can minimise effects of mixed friction and consequently reduce friction losses and wear. The structures with dimensions in the micrometer range offer two fundamental advantages. On the one hand, structures can withhold lubricant to ensure adequate lubricant supply. On the other hand, adapted dimensions, geometries and arrangements of microstructures can help to built up a hydrodynamic lubrication even at low sliding speeds between the friction partners. The demand on investigation can be described by the questions how microstructures are to be laid out in dependency of load case, which manufacturing process to produce microstructures shows the greatest potential and which methods are required to measure and characterise the microstructure.
On this account properties of structured surfaces are examined via methods of simulation and tribological analyses within the Research Unit. To generate deterministically designed and arranged structures cutting processes are applied in this cooperative programme, whereas stochastically microstructures are produced via thermal spaying. By adapted measurement methods and the development of characteristic values structures can be described. Future intentions are to structure functional surfaces in dependency of the load type. Furthermore, it is intended to integrate the micro structuring procedure into the surface finishing generating economic processes for complete manufacturing.
Micro structuring of highly loaded surface areas can minimise effects of mixed friction and consequently reduce friction losses and wear. The structures with dimensions in the micrometer range offer two fundamental advantages. On the one hand, structures can withhold lubricant to ensure adequate lubricant supply. On the other hand, adapted dimensions, geometries and arrangements of microstructures can help to built up a hydrodynamic lubrication even at low sliding speeds between the friction partners. The demand on investigation can be described by the questions how microstructures are to be laid out in dependency of load case, which manufacturing process to produce microstructures shows the greatest potential and which methods are required to measure and characterise the microstructure.
On this account properties of structured surfaces are examined via methods of simulation and tribological analyses within the Research Unit. To generate deterministically designed and arranged structures cutting processes are applied in this cooperative programme, whereas stochastically microstructures are produced via thermal spaying. By adapted measurement methods and the development of characteristic values structures can be described. Future intentions are to structure functional surfaces in dependency of the load type. Furthermore, it is intended to integrate the micro structuring procedure into the surface finishing generating economic processes for complete manufacturing.
DFG Programme
Research Units
Projects
- Methoden und Modelle zur Auslegung von Mikrostrukturen (Applicant Knoll, Gunter )
- Oberflächencharakterisierung auf Basis optische Messtechnik (Applicant Reithmeier, Eduard )
- Spanende Verfahren zur Mikrostrukturierung (Applicants Denkena, Berend ; Dinkelacker, Friedrich )
- Thermisch gespritzte, mikrostrukturierte Beschichtungen (Applicants Bach, Friedrich-Wilhelm ; Dinkelacker, Friedrich )
Spokesperson
Professor Dr.-Ing. Berend Denkena
