Advances in Tribology / 2012 / Article / Fig 7

Research Article

Mechanical and Tribological Properties of PVD-Coated Cemented Carbide as Evaluated by a New Multipass Scratch-Testing Method

Figure 7

SEM micrographs illustrating the major coating failure mechanisms in the multi-pass scratch test. (a) Plastic deformation and minor cracking (no coating material detached), (b) chipping (cohesive failure) in combination with local interfacial spalling (adhesive failure), and (c) continuous interfacial spalling (adhesive failure) for Ti0.34Al0.66N coating. The arrows indicate the scratching direction.

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