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Abstract

Nitrogen-doped DLC (diamond-like carbon) coatings were produced on 316L nitrided austenitic steel in direct current and pulsed glow discharge conditions. The chemical composition, surface topography, hardness and corrosion resistance of the obtained carbon coatings were examined. The coatings varied in surface morphology, roughness and hardness. Direct current glow discharge made it possible to produce a coating characterized by lower hardness, greater thickness and higher nitrogen content. The coating featured improved corrosion resistance and adhesion compared to coatings produced in the pulsed process.

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Authors and Affiliations

T. Borowski
ORCID: ORCID
M. Spychalski
ORCID: ORCID
K. Rożniatowski
ORCID: ORCID
K. Kulikowski
ORCID: ORCID
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Abstract

AISI 316L steel was subjected to nitrocarburizing under glow discharge conditions, which was followed by DLC (diamond-like carbon) coatings deposition using the same device. The coatings were applied under conditions of direct current and pulsed glow discharge. In order to determine the influence of the produced nitrocarbon austenite layer and the type of discharge on the microstructure and mechanical properties of the coatings, the following features were analysed: surface roughness, coating thickness, structure, chemical composition, adhesion and resistance to frictional wear. For comparison purposes, DLC coatings were also deposited on steel without a nitrocarburised layer. The obtained results indicate a significant influence of the type of glow discharge on the roughness, hardness, nitrogen content and of the nitrocarburised layer on the resistance to wear by friction and adhesion of the produced coatings.
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Authors and Affiliations

T. Borowski
1
ORCID: ORCID
K. Kulikowski
1
ORCID: ORCID
M. Spychalski
1
ORCID: ORCID
K. Rożniatowski
1
ORCID: ORCID
B. Rajchel
2
B. Adamczyk-Cieślak
1
ORCID: ORCID
T. Wierzchoń
1
ORCID: ORCID

  1. Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland
  2. Polish Academy of Sciences, Institute of Nuclear Physics, Poland

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