4. Scratch test results on different materials
Although traditionally used to characterize hard coatings, scratch testing is now commonly employed to characterize a much wider spectrum of materials, ranging from hard materials to soft polymers and even elastomers. Some typical examples from each material category are given here.
4.1 Hard ceramic coverings
In common industrial quality control situations, scratch testing can be used for quick and easy grading of different coatings, to differentiate between small changes in composition that could affect coating integrity and adhesion.
The example in figure 13 shows a comparison...
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Scratch test results on different materials
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