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HomeMaterials Science ForumMaterials Science Forum Vol. 990Observation of Coating-Substrate Adhesion of...

Observation of Coating-Substrate Adhesion of Nanocomposite Hard Coating with Respect to the Deposition Parameters and Surface Finishing of Cemented Carbide Substrate

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Abstract:

The paper deals with the issue of coating and surface finishing with edge preparation prior to the coating. Nanocomposite AlCrSiN hard coatings were deposited on WC-Co substrates with a negative substrate bias voltage in range of-80 to-120 V using cathodic arc evaporation system. The effect of variation in the bias voltage on the coating-substrate adhesion and nanohardness was investigated. The maximum nanohardness of coating was 37.7 ± 1.5 GPa with the good coating-substrate adhesion. Static Mercedes indentation test was performed on a Rockwell-type hardness tester. The indents were studied by scanning electron microscope to evaluate the coating-substrate adhesion. The H to E ratio that represents resistance to the plastic deformation was determined. The influence of surface roughness and time of used surface finishing methods on the coating-substrate adhesion was also investigated.

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Nano Engineering and Materials Technologies IV

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Periodical:

Materials Science Forum (Volume 990)

Pages:

231-238

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.990.231

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Online since:

May 2020

Authors:

Tomáš Vopát*, Martin Sahul, Marián Haršáni, Tomáš Zlámal, Ondrej Vortel

Keywords:

Brushing, Coating-Substrate Adhesion, Edge Preparation, Nanocomposite Hard Coating, Wet Microblasting

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* - Corresponding Author

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