Tribological Performance of Silver- and Oxygen-Doped Diamond-Like Carbon Coatings Under Nitrogen-Based Copolymer Additives
Year: 2025
Type: article
Abstract: Additives made of nitrogen-functionalized copolymers were paired with diamond-like carbon (DLC) coatings doped with different amounts of oxygen and silver to form systems capable of improving tribological performance against undoped-DLC/additive systems. Initial characterisation indicated that silver doping reduced hardness and wettability in the surface, contrary to oxygen doping. Adhesion improved with higher doping levels. Tribological testing was done in boundary conditions, with silver-doped DLC coatings achieving a reduction in wear, but not friction. Oxygen-doped DLC coatings showed similar behaviour. Micrographs identified the wear mechanism as pure polishing and proved the protective effect of doped-DLC/additive systems. The findings suggest an across-scales effect of properties in the performance of the system and promising use in applications requiring wear resistance and friction reduction. Graphical abstract
Source: Tribology Letters
Institutions: Instituto Pedro Nunes, University of Coimbra
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,990
Awards: G2374330595, G3284912372, G3507939551, Soluções híbridas para um conceito de lubrificação universal: do contato sólido/sólido ao regime hidrodinâmico, G5404391280, G5542749769, G6970375452, Produção Avançada e Sistemas Inteligentes, Centro de Engenharia Mecânica, Materiais e Processos (CEMMPRE), G8994009364
OpenAlex ID: W4412048586