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Effect of the number of bilayers in Ti/TiN coatings on AISI 316L deposited by sputtering on their hardness, adhesion, and wear

•The nanostructured Ti/TiN multilayer coatings were synthesized by reactive DC sputtering.•The increase of Ti/TiN interfaces favors the increase of the adhesion of coatings.•The increased hardness and adhesion to the substrate improved the tribological properties of the Ti/TiN coatings. In this stud...

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Bibliographic Details
Published in:Materials letters 2022-06, Vol.316, p.132037, Article 132037
Main Authors: Santaella-González, J.B., Hernández-Torres, J., Morales-Hernández, J., Flores-Ramírez, N., Ferreira-Palma, C., Rodríguez-Jiménez, R.C., García-González, L.
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Language:English
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Summary:•The nanostructured Ti/TiN multilayer coatings were synthesized by reactive DC sputtering.•The increase of Ti/TiN interfaces favors the increase of the adhesion of coatings.•The increased hardness and adhesion to the substrate improved the tribological properties of the Ti/TiN coatings. In this study, coatings of 4, 8 and 16 Ti/TiN bilayers were synthesized by sputtering at a total deposition time of 64 min to control the total thickness. Hardness and adhesion are enhanced with increasing number of Ti/TiN bilayers, where 16 Ti/TiN bilayers shown the maximum hardness of 8.40 GPa, without decreasing the adhesion to the substrate achieving a load of 22.03 N for a total delamination. This resulted in a better tribological performance with a wear rate of 3.83 × 10−4 mm3/N m. The change in properties was shown to be due to the increase in the number of Ti/TiN bilayers, which generated hardening mechanisms and crack blocking.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2022.132037