Work

Superlubricity of multilayer titanium doped DLC coatings by using low SAPS organic additives in base oil

Year: 2024

Type: article

Abstract: This study systematically investigates the tribological performance of titanium doped diamond-like carbon monolayer and multilayer coatings with superior mechanical properties. The coatings were lubricated in poly alpha olefin grade 4 (PAO4) base oil, containing three concentrations of two organic, ashless, and sulfur free (low SAPS) antiwear, and extreme pressure additives with different amounts of phosphorus and nitrogen (Duraphos® 178 and Duraphos® OAP). The multilayer Ti-doped DLC coatings exhibited superior tribological performance compared to uncoated steel, undoped DLC, and monolayer Ti-DLC coatings. They exhibited coefficient of friction values which were in the range of 0.013 and 0.006 (superlubricity) for formulations with Duraphos® OAP. Duraphos® 178 significantly lowered the specific wear rates of both the monolayer and multilayer coatings.

Source: Tribology International

DOI: 10.1016/j.triboint.2024.110186

Authors: Mobeen Haneef, Liuquan Yang, Ardian Morina, Bruno Trindade

Institutions: University of Leeds, University of Coimbra

Language: English

Topic: Lubricants and Their Additives

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,230

Funders: Fundação para a Ciência e a Tecnologia, H2020 Marie Skłodowska-Curie Actions