Abstract
The micromechanical properties (hardness and brittleness) of the hard-on-hard SnO2 ∕ Si-coated system (CS) and their modification depending the on load value has been studied. A nonmonotonic changing of microhardness with load growth was detected. The brittle/plastic behavior of the rigid/hard-on-hard SnO2 ∕ Si CS and its response to concentrated load action explains it.A specific evolution of the indentation-deformed zone vs. load value attributed to the change in the internal stress redistribution between film and substrate was detected. It results in a brittleness indentation size effect (BISE) of the SnO2 ∕ Si CS revealed in this experiment.It was shown that the greater portion of internal stresses under indentation is concentrated in the coating layer at small loads. This fact causes a strong elastic–plastic relaxation in the film and its delamination from substrate. The increase of brittle failure in the indentation-deformed zone with a decrease of indentation load was revealed.
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Daria, G., Evghenii, H., Olga, S., Zinaida, D., Iana, M., Victor, Z. (2009). Deformation Microstructures Near Vickers Indentations in SNO2/SI Coated Systems. In: Hahn, H., Sidorenko, A., Tiginyanu, I. (eds) Nanoscale Phenomena. NanoScience and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00708-8_7
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DOI: https://doi.org/10.1007/978-3-642-00708-8_7
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