Effect of Surface Oxide Layer of Steel on the Tribological Characteristics of Load-bearing Additives for Multiply-Alkylated Cyclopentane Oil under High Vacuum

Masuko, Masabumi; Iijima, Shigeru; Terawaki, Takahiro; Suzuki, Akihito; Aoki, Saiko; Nogi, Takashi; Obara, Shin’ya

doi:10.1007/s11249-013-0152-8

Cited by 10 publications

(11 citation statements)

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“…The oxide scale may have different tribological behaviour and differing relative thicknesses depending on the temperature [9], the atmosphere, and the chemical composition of the alloys [10]. The surface oxide layer of steel can change the tribological characteristics of lubrication [11]. The oxide scale could be abrasive or lubricated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

et al. 2016

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L. (2016). Influence of Cr-Rich oxide scale on sliding wear mechanism of ferritic stainless steel at high temperature. Tribology Letters, 63 (2), 1-13.Influence of Cr-Rich oxide scale on sliding wear mechanism of ferritic stainless steel at high temperature AbstractThe tribological tests of a ferritic stainless steel (FSS) 445 in contact with high-speed steel (HSS) were performed on a high-temperature pin-on-disc tribometer. Wear exhibited significant difference when the FSS 445 was oxidised with a Cr-rich oxide scale on the surface. The HSS pin displayed adhesive wear when there was no oxide scale on the stainless steel disc, and in the early stages, the coefficient of friction fluctuated significantly, but the level of wear changed as Cr2O3 particles formed. The wear was then reduced, and the coefficient of friction remained stable. The Cr-rich oxide scale which formed on the stainless steel was able to stabilise the coefficient of friction, to reduce the wear rate and to help form a glazed layer on the HSS surface. The abrasive wear of the HSS pin took place at 850 °C, indicating that the hardness of the Cr-rich oxide scale increased as the temperature decreased. AbstractThe tribological tests of a ferritic stainless steel (FSS) 445 in contact with high speed steel (HSS)were performed on a high temperature pin-on-disc tribometer. Wear exhibited significant difference when the FSS 445 was oxidised with a Cr-rich oxide scale on the surface. The HSS pin displayed adhesive wear when there was no oxide scale on the stainless steel disc and in the early stages, the coefficient of friction fluctuated significantly but the level of wear changed as Cr 2 O 3 particles formed. The wear was then reduced and the coefficient of friction remained stable. The Cr-rich oxide scale which formed on the stainless steel was able to stabilize the coefficient of friction, to reduce the wear rate and to help form a glazed layer on the HSS surface. The abrasive wear of the HSS pin took place at 850 °C, indicating that the hardness of the Cr-rich oxide scale increased as the temperature decreased.

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Section: Introductionmentioning

confidence: 99%

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

et al. 2016

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“…Figure 3 shows the results of the lifetime test, in which the lubrication lifetime is shown as a function of the oil film thickness initially supplied. Since we have already reported the results obtained with MAC [8,16], Figure 4 shows the average friction coefficients and wear volumes of steel balls in the 48-hour test. The notable results regarding friction were that MAC showed the highest and PFPE the lowest friction coefficients among all the lubricants tested, and all the ionic liquids had similar friction coefficients, which were intermediate between those of MAC and PFPE.…”

Section: Resultsmentioning

confidence: 99%

“…and 15.0 mm length, SUS440C stainless steel) were used. In this study, the disk specimen was used as received without further polishing, and then this specimen was equivalent to the thick-oxide specimen reported previously [15,16]. The average surface roughness of the disk specimens was approximately Ra = 15 nm.…”

Section: Vacuum Tribometermentioning

confidence: 99%

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Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature

et al. 2015

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The objective of this study is to evaluate the boundary lubrication performance of ionic liquids under high vacuum and low temperature by taking the cosmic space environment into consideration, as a screening stage prior to evaluating lubrication performance in actual space mechanisms. The boundary lubrication performance of ionic liquids was evaluated at room temperature with a reciprocating linear motion tribometer, and at low temperature (from −80°C to room temperature) with a unidirectional rotation tribometer. Low-temperature rheometry was also carried out. Ionic liquids showed a supercooling state and crystallization. This crystallization was prevented by mixing different ionic liquids together. The equimolar mixture of 1-ethyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (EMI-TFSA), 1-butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (BMI-TFSA), and 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl) amide (HMI-TFSA) showed no crystallization in our experiment. The antiwear performance of this sample oil mixture was similar to that of MAC and much better than that of PFPE at low temperatures. This mixture prevented metal contact at −80°C, most likely due to its high viscosity and high adsorption of molecules.

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“…These ILs have been shown to exhibit superior antiwear and friction-reducing properties. Because triboreaction film has been detected on rubbed steel surfaces via X-ray photoelectron spectroscopy (XPS), ILs are thought to break down upon reaction with steel surfaces [2][3][4][5][6][7][8][9][10][11][12]. This behavior of ILs is similar to that of extreme pressure (EP) additives, which typically contain sulfur, phosphorus, or halogen atoms.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Long Alkyl Chain in Protic Ionic Liquids Molecules on Tribological Properties at High Temperature

2020

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Effect of Surface Oxide Layer of Steel on the Tribological Characteristics of Load-bearing Additives for Multiply-Alkylated Cyclopentane Oil under High Vacuum

Cited by 10 publications

References 20 publications

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

Influence of Cr-Rich Oxide Scale on Sliding Wear Mechanism of Ferritic Stainless Steel at High Temperature

Lubrication Performance of Ionic Liquids as Lubricants for Space Mechanisms under High Vacuum and Low Temperature

Effect of a Long Alkyl Chain in Protic Ionic Liquids Molecules on Tribological Properties at High Temperature

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