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Chromium carbide coatings obtained by the hybrid PVD methods

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Author(s): M. Richert | A. Mazurkiewicz | J. Smolik

Journal: Journal of Achievements in Materials and Manufacturing Engineering
ISSN 1734-8412

Volume: 43;
Issue: 1;
Start page: 145;
Date: 2010;
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Keywords: PVD processes | Chromium carbide coatings | Nanomaterials | Amorphous phase

ABSTRACT
Purpose: With the use of the Arc-PVD and Arc-EB PVD hybrid method, the chromium carbide coatings were deposited on steel substrate. Two kinds of coatings were obtained. The nanostructure coatings were formed by deposition of chromium carbide films by Arc PVD evaporation technique. The multilayer coatings were produced by Arc-EB PVD hybrid technology. In the second case the amorphous phase in majority was found in samples, identified by X-ray investigations.Design/methodology/approach: The Arc PVD and combination Arc-EB PVD methods were used for carbide coatings deposition. The special hybrid multisource device, produced in the Institute for Sustainable Technologies – National Research Institute (ITeE –PIB) in Radom, was used for sample deposition. The microstructures of coatings were investigated by JEM 20101 ARP transmission electron microscopy (TEM), TESLA BS500 scanning electron microscopy (SEM) and Olympus GX50 optical microscopy (MO). The X-ray diffraction was utilized to identify phase configuration in coatingsFindings: The microstructure of deposited coatings differs depending on the deposition method used. The Arc PVD deposition produced nanometric coatings with the Cr3C2, Cr23C6, Cr7C3 and CrC carbides built from nanometric in size clusters. In the case of the Arc-EB PVD hybrid technology in majority of cases the amorphous microstructure of coatings was found. The hybrid coatings consist of alternating layers of Ni/Cr-Cr3C2.Practical implications: The performed investigations provide information, which could be useful in the industrial practice for the production of wear resistant coatings on different equipments and tools.Originality/value: It was assumed that by using different kinds of PVD methods the different microstructures of coatings could be formed.

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