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April 26, 2026LubricantsOpen Access

Ultralow-Friction in Graphene–Nanodiamond Functionalized DLC Coatings: Transfer-Layer Evolution Under Variable Load and Humidity

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Authors

AMAndrea MescolaFZFederico ZanniARA. Rota

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Overview

Randomized trial examines ultralow friction mechanisms in coatings, indicating critical impacts of load and humidity.

Key Points

  • This research explores how the lubrication mechanism of DLC coatings changes under varying loads and humidity conditions.
  • Ball-on-disk experiments conducted on industrial hydrogenated DLC coatings against stainless-steel
  • Load varied from 1 N to 10 N, mimicking local contact pressures of 11-16 GPa
  • Analyses included microscopy and spectroscopy to evaluate transfer layer evolution.
  • In dry N2, GS-ND functionalization results in a minimum coefficient of friction of 0.05, stable across loads.
  • Humid air increases friction levels to ~0.10-0.15 due to oxidation processes.
  • Oxygen content in the wear debris increased by more than three times compared to dry N2 conditions.

Cite This Study

Mescola et al. (2026) studied this question.

synapsesocial.com/papers/69edac4f4a46254e215b40f4https://doi.org/10.3390/lubricants14050184
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