Effect of carbon content on structural, mechanical and tribological properties of Cr-V-C-N coatings

THIN SOLID FILMS

卷:732

Article

Aissani, Linda^1,2  Alhussein, Akram³  Belgroune, Ahlam^2,3  Nouveau, Corinne⁴  Zgheib, Elia³  Barille, Regis⁵  Montagne, Alex⁶ 

[1] Abbes Laghrour Khenchela Univ, Matersci Dept, PO1252, Khenchela 40004, Algeria

[2] Larbi Ben MHidi Univ, Lab Act Components & Mat, Oum El Bouaghi 04000, Algeria

[3] Univ Technol Troyes, Pole Technol Sud Champagne, LASMIS, 26 Rue Lavoisier, F-52800 Nogent, France

[4] HESAM Univ, Arts & Metiers Inst Technol, LABOMAP, F-71250 Cluny, France

[5] Univ Angers, Moltech Anjou, CNRS UMR 62002, Bd Lavoisier, F-49045 Angers, France

[6] HESAM Univ, Arts & Metiers Inst Technol, MSMP, F-59000 Lille, France

关键词: Cr-V-C-N coating;    Steel;    Magnetron sputtering;    Wear resistance;    Nanoindentation;    Microstructure analysis;    Surface topography;   

DOI  :  10.1016/j.tsf.2021.138782

来源: Elsevier

【 摘 要 】

Cr-V-C-N thin films were deposited on XC100 steel and Si(100) wafers by a radio frequency magnetron sputtering technique using chromium and vanadium targets in an Ar/N2/CH4 mixture atmosphere. The microstructure, mechanical and tribological properties of coatings were investigated as a function of carbon content. It has been found that the quaternary Cr-V-C-N coatings containing a low percentage of carbon (<= 12.4 at.%) exhibited a mixture of chromium and vanadium nitrides nano-sized crystallite phases. The coatings containing a high carbon content (> 25 at.%) were consisted of nitride and carbide phases, where the large carbon atoms inserted through CrN and VN. Mechanical properties of the Cr-V-C-N coatings were influenced by the carbon addition. The maximum hardness value of 28.3 GPa was obtained for the coating containing 28 at.% of carbon which is related to the adhesion strength enhanced by the formation of carbide and nitride mixture. Addition of carbon into the Cr-V-N coating led to significantly decrease its friction coefficient from 0.63 to 0.47. The formation of carbides through the dispersion of carbon in the grains effectively improved the density of the Cr-V-C-N coatings so that the coating deposited under a high CH4 flow rate exhibited a better wear resistance than the other Cr-V-N and Cr-V-C coatings.

【 授权许可】

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