| Popis: |
Common material properties, e.g. hardness, tensile modulus and strength, poisson’s ratio, are well known. On the other hand, properties of thin layers or composite materials can differ significantly from those data, in particular for micro-/nano-particle systems. AFM and FFM methods work with excellent lateral, topographic and force resolution but often do not provide testing-situations close to practical applications. Optimization of scratch- and wear-properties especially of relevance on curved and topographically structured surfaces need access to measurement techniques, that cover the gap between micro and nano scale. An innovative technique is presented and results of this micro-structure-analysis procedure with high local resolution MISTAN are shown. The advantages of in-situ measurements of total, permanent, elastic deformation and friction force on e.g. polymer-, glass- and metal-samples as well as on coated and composite materials are presented. The local topographical variation and impact on the local tribosystem is demonstrated. It also tinned out that in-situ measurements of scratch resistance with stepwise increase of load correlated with simultaneous micro force measurements are of great relevance for the characterization and differentiation of materials. |
