Wear acceleration of a-C:H coatings by molybdenum-derived particles: Mixing and temperature effects

K. A.M. Kassim, T. Tokoroyama, M. Murashima, W. Y. Lee, N. Umehara, M. M.B. Mustafa

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

MoDTC has also been reported to degrade into other Mo-derived compounds. It is essential to analyze the effects of each type of MoDTC-degraded material on DLC. Therefore, we chose powder-type MoDTC, MoS2, Mo, MoO3, and Mo2C additives to be dispersed individually into a base oil and tested on an a-C:H sliding against a steel ball under boundary lubrication conditions at 80 °C. We then obtained surface-enhanced Raman scattering (SERS), which proved that MoS2 has the possibility of extracting hydrogen from the topmost surface as chemical wear (hydrogen content decreased from 30 to 35 at.% to 20 at.% of as-deposited) and that MoO3, MoDTC, and Mo have the possibility of catalytic reactions with carbon atoms. Mo2C exhibited abrasive accelerate of the a-C:H wear.

Original languageEnglish
Article number106944
JournalTribology International
Volume159
DOIs
Publication statusPublished - 2021 Jul

Keywords

  • Hydrogenated amorphous carbon
  • MoDTC
  • SERS
  • Wear acceleration

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