Customized diamond-like coatings reduce frictional losses.

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Functional coating materials for optical applications, shaping, anti-corrosives

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Tribological and Functional Coatings

One of the keys to reducing friction and protecting against wear is to coat components with diamond-like carbon (DLC) or hydrocarbon layers. Further functions of components like reflection, sensors and barrier effect are adjusted via PVD coatings. With the help of in-built elements that modify networks into the plasma coating, we can create optimum lubricant wettability and prevent unwanted adhesion. Our process technology, with the aid of plasma diagnosis, is capable of controlling both the inherent and the topographical properties of amorphous hydrocarbon layers as well as binary and ternary hard materials. 

Services

 

DLC coatings for roller bearings and sliding bearings and for motor components

Coatings for plastics and tools for lastics moulding

Production and qualification of in-situ structured PVD and DLC layers

Development of thick DLC layers

Development of screen coatings for screen printing technology

Development of abrasion-tolerant DLC-BN multi-layers

Development of strong electrically insulating DLC layers, sensor layers

Development of materials for corrosion protection, diamond heteropitaxy 

Topics

 

PACVD systems engineering

 

With specially developed and patented coating equipment, fast-growing DLC layers can be applied on components at high plasma density with efficient processes. The systems are adaptable to the geometry and size of the components; complex component shapes can be coated evenly all around. Due to the two-chamber principle (inert gas chamber and reactive gas chamber), the systems are low-maintenance...

 

Mesoscale film growth simulation

 

The development of surface structure in the deposition process and the influence of deposition conditions on structural development are examined using mesoscopic growth models. 

By simulating the interaction of deposition and transport of materials on the surface, the emergence of surface structures can be modeled on the computer and examined in a level of detail which is impossible experimentally... 

 

In-situ structured DLC layers

 

An advanced coating technology permits the setting of a specific topography during the deposition without prior structuring. This leads to substantial progress in friction and wear reduction and therefore to the reduction of lubricants and release agents. The reliability and service life of the drive and system components are significantly increased...

 

Multi-layer DLC-BN layers

 

DLC layers can be largely affected by doping and deposition parameters. The positive properties of individual layers can be combined through a combination of different layers in a multilayer coating structure. The wear resistance and temperature stability can be increased by introducing high wear-resistant (amorphous or hexagonal) boron nitride layers...

 

Functional nanostructures for optics and microsystems


Component function can be controlled to a great extent through surface structuring. Optical, medical and tooling technology applications each require different surface textures on a micro and nano scale. These are generated by exploiting the self-organization effects during the growth of PVD layers. For instance: surfaces can be made water and dirt proof, the cell adhesion on the surface of an implant can be controlled, and polymer components ...

 

Forming layers


We research anti-adhesive, contact-inert and highly temperature-resistant layer systems for the precision hot forming of glass and polymers. For mineral glass, we mainly use highly temperature-resistant sintered systems and layers containing precious metals. We also develop organic layer materials for polymer processing that improve demolding conditions and prolong tool service life. We develop innovative layer-by-layer coating processes for the complex coatings of high-aspect structures...

 

Layer analysis of coating performance


The operational behavior of layers is largely determined by the deposition conditions during application and the resultant material properties such as chemical composition, microstructure and stress state. Material compositions are characterized in their relationship to depth using optical glow discharge spectroscopy. Temperature-dependent residual stress states in the layers are identified via a heated interferometer. The analyses enable us to identify...

 

Publications regarding Tribological and Functional Coatings


Contributions to newspapers, books and conferences as well as dissertations and project reports...