Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

Method to detect the particle distribution in the surface of a Ni-P-PTFE dispersion coating by enhanced AFM technologies

The surface properties of a dispersion coating depend strongly on the distribution of the incorporated particles. For instance, in the case of the auto-catalytic Ni-P-PTFE coating, the fouling behaviour of the surface improves only with the quantity of PTFE in the surface, if the PTFE-particles are homogenously distributed. To develop new coating systems and to investigate their properties it is necessary to have a possibility to detect the location of the particles in the surface.

With an enhanced AFM technology a way was found to obtain information about the particle distribution in the outer surface of a Ni-P-PTFE coating. The same technique may also be used for almost all kinds of dispersion coating systems. The advantage as compared to REM measurements is the possibility to obtain with the AFM two completely independent images. One represents the topography and the other the particle distribution. This technology will even be applicable down to micro-scale. In the present investigation PTFE-particles with a diameter of 0.2µm have been detected without any problems.

Reported by

University of Stuttgart
Pfaffenwaldring 6
70550 Stuttgart
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