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Mutually enhanced mechanical and tribological properties in magnetron sputtered Mo2N/Ag-SiNx self-lubricating multilayered films via epitaxial growth design

2025-10Artigo de investigação Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Mecânica
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorFernandes, Filipe
dc.contributor.authorLuan, Jing
dc.contributor.authorWang, Lei
dc.contributor.authorDong, Songtao
dc.contributor.authorChoukourov, Andrei
dc.contributor.authorYang, Junfeng
dc.contributor.authorKalin, Mitjan
dc.contributor.authorCavaleiro, Albano
dc.contributor.authorJu, Hongbo
dc.contributor.editorVincenzini, P.
dc.date.accessioned2026-01-30T18:15:18Z
dc.date.available2026-01-30T18:15:18Z
dc.date.issued2025-10
dc.description.abstractAchieving simultaneous enhancement of both mechanical and self-lubricating properties by incorporating soft lubricants into nitride films has been a longstanding challenge in the development of solid lubricant materials. This paper introduced a novel approach to overcome this challenge by developing coherent-structured Mo2N/Ag-SiNx multilayered films using radio frequency (RF) magnetron sputtering. The multilayer films were designed with a fixed modulation period of 30 nm, while the modulation ratio (γ) was varied from 1:9 to 1:1. The Mo2N layers exhibited a single fcc-Mo2N phase, while the Ag-SiNx layers formed a dual-phase structure comprising fcc-Ag nanoparticles embedded in an amorphous SiNx matrix. At a modulation ratio of 1:9, the Ag-SiNx layer epitaxially grew on the Mo2N template, resulting in a coherent structure. This coherent structure significantly enhanced both the hardness and elastic modulus, reaching approximately 36 GPa and 230 GPa, respectively. The improved wear resistance at room temperature can be attributed to the coherent strengthening effect, which not only elevated the film's hardness but also eliminated sharp interfaces between modulation layers, thereby reducing crack initiation sites. In temperature-cycling tribo-testing from room temperature to 600 °C, the film with a γ of 1:9 maintained a stable coefficient of friction around 0.2, except during the initial room temperature, where it was 0.4. The wear rate could not be accurately calculated due to the adhered tribolayer on the top of the wear track following the initial tribo-test at 600 °C. The excellent tribological properties across temperature cycles were attributed to the synergistic lubricant characteristics of both layers and the formation of self-lubricating tribo-phases. The optimized Mo2N/Ag-SiNx multilayered films provide an effective balance of lubrication and mechanical stability under extreme conditions, making them highly promising for high-performance engineering applications.eng
dc.description.sponsorshipSupported by the projects granted by the National Natural Science Foundation of China with the number of 52171071 and 51801081, national funds through FCT of Portugal – Fundação para a Ciência e a Tecnologia, under a scientific contract of 2021.04115. CEECIND, 2023.06224.CEECIND, under projects UID/00285- Centre for Mechanical Engineering, Materials and Processes, LA/P/0112/2020, Slovenian Research Agency ARIS under the Research Core Funding Programme No. P2-0231 and the Marie Skłodowska-Curie Actions (MSCA) with the number of MSCA-COFUND-5100-237/2023-9. Prof. H. Ju's student - F. Kong also acknowledged the Post-graduate Research Innovative Training Program Jiangsu Province of China, with a number of SJCX23_2190.
dc.identifier.citationJing Luan, Lei Wang, Songtao Dong, Filipe Fernandes, Andrei Choukourov, Junfeng Yang, Mitjan Kalin, Albano Cavaleiro, Hongbo Ju, Mutually enhanced mechanical and tribological properties in magnetron sputtered Mo2N/Ag-SiNx self-lubricating multilayered films via epitaxial growth design, Ceramics International, Volume 51, Issue 25, Part A, 2025, Pages 43924-43932, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2025.07.123.
dc.identifier.doi10.1016/j.ceramint.2025.07.123.
dc.identifier.issn0272-8842
dc.identifier.urihttp://hdl.handle.net/10400.22/31766
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S0272884225033449?via%3Dihub
dc.relation.ispartofseriesPart A
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMagnetron sputtering
dc.subjectMo2N/Ag-SiNx multilayered films
dc.subjectCoherent strengthening
dc.subjectMechanical properties
dc.subjectTribological properties
dc.titleMutually enhanced mechanical and tribological properties in magnetron sputtered Mo2N/Ag-SiNx self-lubricating multilayered films via epitaxial growth designeng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.endPage43932
oaire.citation.issue25
oaire.citation.startPage43924
oaire.citation.titleCeramics International
oaire.citation.volume51
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameFernandes
person.givenNameFilipe
person.identifier995468
person.identifier.ciencia-id2113-A18B-EEE8
person.identifier.orcid0000-0003-4035-3241
person.identifier.scopus-author-id55644767300
relation.isAuthorOfPublicationf3fb450f-5f22-4f0c-8916-7742d519f6af
relation.isAuthorOfPublication.latestForDiscoveryf3fb450f-5f22-4f0c-8916-7742d519f6af

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