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

doi:10.1016/j.triboint.2021.106944

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 journal › Article › peer-review

17 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 language	English
Article number	106944
Journal	Tribology International
Volume	159
DOIs	https://doi.org/10.1016/j.triboint.2021.106944
Publication status	Published - 2021 Jul
Externally published	Yes

Keywords

Hydrogenated amorphous carbon
MoDTC
SERS
Wear acceleration

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

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

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.",

keywords = "Hydrogenated amorphous carbon, MoDTC, SERS, Wear acceleration",

author = "Kassim, {K. A.M.} and T. Tokoroyama and M. Murashima and Lee, {W. Y.} and N. Umehara and Mustafa, {M. M.B.}",

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doi = "10.1016/j.triboint.2021.106944",

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T2 - Mixing and temperature effects

AU - Kassim, K. A.M.

AU - Tokoroyama, T.

AU - Murashima, M.

AU - Lee, W. Y.

AU - Umehara, N.

AU - Mustafa, M. M.B.

PY - 2021/7

Y1 - 2021/7

N2 - 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.

AB - 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.

KW - Hydrogenated amorphous carbon

KW - MoDTC

KW - SERS

KW - Wear acceleration

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

Abstract

Keywords

ASJC Scopus subject areas

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