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Dr. Hanaor - Department of Ceramic Materials - TU Berlin's picture

Electro-mechanical behaviour or rough surfaces

Understanding electrical contact resistance 

Electrical contact resistance at interfaces between pairs of rough surfaces is of great importance in the performance of diverse systems, particularly in miniaturised electromechanical systems containing switches.

 

In this study, the role of pressure and surface structure is explored with a view towards gaining a beter understanding of electrical contact resistance.

 

Dr. Hanaor - Department of Ceramic Materials - TU Berlin's picture

Electrical resistance at rough surfaces in contact

Electrical Contact Resistance of Fractal Rough Surfaces 

 

The presence of roughness at electrical contacts tends to involve contacting asperities across multiple scales. Depending on the nature of the contact between asperities on opposing surfaces, different conduction mechanisms take place. This is shown in the figure here.

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