Tribological and mechanical behaviors of CrN/a-CNx superlattice thin films

CrN/a-CNx superlattice thin films, which consisted of a superhard coating combined with a lamination of a hard transition metal nitride and lubrication material, were synthesized by Closed Field Unbalanced Magnetron Sputtering (CFUBMS). The bilayer period (lambda) was controlled in the range from 3....

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Bibliographic Details
Published in:Surface & coatings technology 2008-12, Vol.203 (5-7), p.790-793
Main Authors: KIM, Youn J, BYUN, Tae J, HAN, Jeon G
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Methods of deposition of films and coatings
film growth and epitaxy
Nonmetallic coatings
Physics
Production techniques
Surface treatment
Surface treatments
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Summary:CrN/a-CNx superlattice thin films, which consisted of a superhard coating combined with a lamination of a hard transition metal nitride and lubrication material, were synthesized by Closed Field Unbalanced Magnetron Sputtering (CFUBMS). The bilayer period (lambda) was controlled in the range from 3.1 to 37.7 nm via the rotational speed of the substrate holder. The preferred orientation of the CrN/a-CNx superlattice thin films was CrN (200). Nano-indentation testing showed that the hardness of the coatings varied from 20 to 32 GPa as the bilayer period (lambda) was varied from 3.1 to 37.7 nm with the highest hardness being obtained with a bilayer period of about 6.3 nm. In this case, the lowest friction coefficient was also obtained, due to high plastic deformation resistance.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2008.08.020