The wear classification of MoDTC-derived particles on silicon and hydrogenated diamond-like carbon at room temperature

K. A.M. Kassim; T. Tokoroyama; M. Murashima; N. Umehara

doi:10.1016/j.triboint.2020.106176

The wear classification of MoDTC-derived particles on silicon and hydrogenated diamond-like carbon at room temperature

K. A.M. Kassim, T. Tokoroyama, M. Murashima, N. Umehara

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Molybdenum dithiocarbamate (MoDTC) is well-known as a friction-modifier in engine oil but has wear accelerating effects on DLC/steel sliding contact. Since MoDTC was reported degradable to other materials, the effect of each material on wear acceleration has not been clarified yet. Therefore, it is necessary to divide which Mo-derived compound has a major role to enhance wear. Thus, powder-type MoDTC, MoO₃, Mo₂C, MoS_2, and Mo were dispersed into Poly-alpha-olefin (PAO), and tested on a-C:H and Si-DLC against steel ball at room temperature. For Mo₂C, MoDTC, and MoO₃, the specific wear rate of a-C:H was approximately 3.4 × 10⁻⁵, 3.2 × 10⁻⁶ and 1.5 × 10⁻⁶ mm³/Nm, respectively. MoDTC indicated higher affection than MoO₃ regardless of the particles’ hardness. Si-DLC showed better wear prevention compared to a-C:H.

Original language	English
Article number	106176
Journal	Tribology International
Volume	147
DOIs	https://doi.org/10.1016/j.triboint.2020.106176
Publication status	Published - 2020 Jul
Externally published	Yes

Keywords

a-C:H DLC
MoC
MoDTC
MoO
Si-DLC

ASJC Scopus subject areas

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

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title = "The wear classification of MoDTC-derived particles on silicon and hydrogenated diamond-like carbon at room temperature",

abstract = "Molybdenum dithiocarbamate (MoDTC) is well-known as a friction-modifier in engine oil but has wear accelerating effects on DLC/steel sliding contact. Since MoDTC was reported degradable to other materials, the effect of each material on wear acceleration has not been clarified yet. Therefore, it is necessary to divide which Mo-derived compound has a major role to enhance wear. Thus, powder-type MoDTC, MoO3, Mo2C, MoS2, and Mo were dispersed into Poly-alpha-olefin (PAO), and tested on a-C:H and Si-DLC against steel ball at room temperature. For Mo2C, MoDTC, and MoO3, the specific wear rate of a-C:H was approximately 3.4 × 10−5, 3.2 × 10−6 and 1.5 × 10−6 mm3/Nm, respectively. MoDTC indicated higher affection than MoO3 regardless of the particles{\textquoteright} hardness. Si-DLC showed better wear prevention compared to a-C:H.",

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author = "Kassim, {K. A.M.} and T. Tokoroyama and M. Murashima and N. Umehara",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

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doi = "10.1016/j.triboint.2020.106176",

language = "English",

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AU - Kassim, K. A.M.

AU - Tokoroyama, T.

AU - Murashima, M.

AU - Umehara, N.

PY - 2020/7

Y1 - 2020/7

N2 - Molybdenum dithiocarbamate (MoDTC) is well-known as a friction-modifier in engine oil but has wear accelerating effects on DLC/steel sliding contact. Since MoDTC was reported degradable to other materials, the effect of each material on wear acceleration has not been clarified yet. Therefore, it is necessary to divide which Mo-derived compound has a major role to enhance wear. Thus, powder-type MoDTC, MoO3, Mo2C, MoS2, and Mo were dispersed into Poly-alpha-olefin (PAO), and tested on a-C:H and Si-DLC against steel ball at room temperature. For Mo2C, MoDTC, and MoO3, the specific wear rate of a-C:H was approximately 3.4 × 10−5, 3.2 × 10−6 and 1.5 × 10−6 mm3/Nm, respectively. MoDTC indicated higher affection than MoO3 regardless of the particles’ hardness. Si-DLC showed better wear prevention compared to a-C:H.

AB - Molybdenum dithiocarbamate (MoDTC) is well-known as a friction-modifier in engine oil but has wear accelerating effects on DLC/steel sliding contact. Since MoDTC was reported degradable to other materials, the effect of each material on wear acceleration has not been clarified yet. Therefore, it is necessary to divide which Mo-derived compound has a major role to enhance wear. Thus, powder-type MoDTC, MoO3, Mo2C, MoS2, and Mo were dispersed into Poly-alpha-olefin (PAO), and tested on a-C:H and Si-DLC against steel ball at room temperature. For Mo2C, MoDTC, and MoO3, the specific wear rate of a-C:H was approximately 3.4 × 10−5, 3.2 × 10−6 and 1.5 × 10−6 mm3/Nm, respectively. MoDTC indicated higher affection than MoO3 regardless of the particles’ hardness. Si-DLC showed better wear prevention compared to a-C:H.

KW - a-C:H DLC

KW - MoC

KW - MoDTC

KW - MoO

KW - Si-DLC

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The wear classification of MoDTC-derived particles on silicon and hydrogenated diamond-like carbon at room temperature

Abstract

Keywords

ASJC Scopus subject areas

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