Low-cost solid FeS lubricant as a possible alternative to MoS2 for producing Fe-based friction materials

Peng, Tao; Yan, Qingzhi; Zhang, Yan; Shi, Xiaojiao; Ba, Ming-yang

doi:10.1007/s12613-017-1385-6

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…Based on this material, devices triggered by heat can be triggered by heat can be realized. Furthermore, FeS films were found to be excellent low-friction materials working like solid state lubricants in tribological applications [16].…”

Section: Introductionmentioning

confidence: 99%

“…The electron concentration n e measured by the Langmuir probe at the position of the substrate decreases over this change of Q H 2 S from 10 18 down to 10 17 m −3Coatings 2020, 10, 246 2 of 16 realized. Furthermore, FeS films were found to be excellent low-friction materials working like solid state lubricants in tribological applications [16].High-power impulse magnetron sputtering system (HiPIMS) is a relatively novel approach for the deposition of thin films [17][18][19][20]. This method utilizes very high discharge current densities during the pulse j D > 1 A cm −2 , but, simultaneously, average power applied in the HiPIMS discharge is similar to DC magnetron sputtering.…”

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confidence: 99%

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Plasma Diagnostics in Reactive High-Power Impulse Magnetron Sputtering System Working in Ar + H2S Gas Mixture

et al. 2020

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A reactive high-power impulse magnetron sputtering system (HiPIMS) working in Ar + H 2 S gas mixture was investigated as a source for the deposition of iron sulfide thin films. As a sputtering material, a pure Fe target was used. Plasma parameters in this system were investigated by a time-resolved Langmuir probe, radio-frequency (RF) ion flux probe, quartz crystal monitor modified for measurement of the ionized fraction of depositing particles, and by optical emission spectroscopy. A wide range of mass flow rates of reactive gas H 2 S was used for the investigation of the deposition process. It was found that the deposition rate of iron sulfide thin films is not influenced by the flow rate of H 2 S reactive gas fed into the magnetron discharge although the target is covered by iron sulfide compound. The ionized fraction of depositing particles decreases from r ≈ 40% to r ≈ 20% as the flow rate of H 2 S, Q H 2 S , changes from 0 to 19 sccm at the gas pressure around p ≈ 1 Pa in the reactor chamber. The electron concentration n e measured by the Langmuir probe at the position of the substrate decreases over this change of Q H 2 S from 10 18 down to 10 17 m −3Coatings 2020, 10, 246 2 of 16 realized. Furthermore, FeS films were found to be excellent low-friction materials working like solid state lubricants in tribological applications [16].High-power impulse magnetron sputtering system (HiPIMS) is a relatively novel approach for the deposition of thin films [17][18][19][20]. This method utilizes very high discharge current densities during the pulse j D > 1 A cm −2 , but, simultaneously, average power applied in the HiPIMS discharge is similar to DC magnetron sputtering. These conditions result in a high degree of ionization of sputtered particles. Thus, the deposited films have higher density, better adhesion, and 3D objects such as trenches, etc. and can be more uniformly coated as well [21][22][23]. Recently, reactive HiPIMS in various gas mixtures has been used for the deposition of oxides, nitrides, and other materials [24][25][26][27][28][29][30][31].In this paper, we will present the first study of plasma parameters in the reactive HiPIMS in Ar + H 2 S gas mixture whose results could be further used for the optimization of deposition of iron sulfide thin films or other types of sulfides. ExperimentalThe experimental setup of the reactive HiPIMS in Ar + H 2 S gas mixture can be seen in Figure 1. The system is equipped with a pure iron Fe target with an outer diameter of 50 mm and a thickness of 0.8 mm. The stainless-steel reactor vacuum chamber is continuously pumped by a combination of turbomolecular (pumping speed S t = 250 L·s −1 ) and rotary vane pumps (pumping speed S r = 25 m 3 h −1 ). The gas flow rates of Ar (99.9999%) and pure H 2 S (99.5%) are independently controlled by two mass flow controllers. It is useful to note that H 2 S is an inflammable and highly toxic gas. Consequently, the use of H 2 S in a laboratory is subject to approval by a respective official body. The pressure in the reactor cham...

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Plasma Diagnostics in Reactive High-Power Impulse Magnetron Sputtering System Working in Ar + H2S Gas Mixture

et al. 2020

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“…FeS is considered as an excellent solid lubricant because of its hexagonal structure, low shear strength, and high melting point [22,[30][31][32][33][34]. Moreover, the cost is very low, only about 1% that of MoS 2 coating which is also considered as a good solid lubricant for the gears [35,36]. Recently, it has been confirmed that the FeS solid lubrication coatings deposited on steels by ion sulfurizing [22,31,[37][38][39], plasma spraying [22,40], plasma source ion sulfurizing [41], can significantly improve the lubrication property of steels.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Tribological Properties of Self-Lubricating FeS Coating Prepared by Chemical Bath Deposition Coating Technique

Yang

et al. 2019

Applied Sciences

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The FeS solid lubricating coatings were prepared on the AISI 5140 steel by chemical bath deposition (CBD) coating technique at various temperatures from 30 to 90 °C. The influence of temperature on microstructure, microcracks, and tribological properties was characterized and studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive spectrometry (EDS). The results show that the coating mainly consists of FexSy (FeS, FeS2, and Fe1−xS), and has a chrysanthemum-shaped (CS) morphology composed of the FeS crystal petals. The CS particles nucleate at about 30 °C, rapidly grow and reach a peak thickness at about 50–70 °C, and finally disappear and are replaced by disordered thick petals at 90 °C. The wear resistance of the steel was improved obviously after introducing of FeS coatings, owing to that the coatings can provide better lubrication and improve the wear resistance.

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“…4 Peng et al prepared the improved tribological properties of Cu-Fe-based friction materials by adding FeS and MoS 2 . 5 In addition, the surface treatment can also be used to improve the friction and wear properties of materials, such as the improvement of surface texture. 6 Friction materials prepared by powder metallurgy techniques have been used extensively in aircra, tanks, high-speed trains, brakes, and clutches.…”

Section: Introductionmentioning

confidence: 99%

Effects of rare-earth oxides on the microstructure and properties of Fe-based friction materials synthesized by in situ carbothermic reaction from vanadium-bearing titanomagnetite concentrates

Zhai

Feng

et al. 2019

RSC Adv.

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Low-cost solid FeS lubricant as a possible alternative to MoS2 for producing Fe-based friction materials

Cited by 11 publications

References 21 publications

Plasma Diagnostics in Reactive High-Power Impulse Magnetron Sputtering System Working in Ar + H2S Gas Mixture

Plasma Diagnostics in Reactive High-Power Impulse Magnetron Sputtering System Working in Ar + H2S Gas Mixture

Microstructure and Tribological Properties of Self-Lubricating FeS Coating Prepared by Chemical Bath Deposition Coating Technique

Effects of rare-earth oxides on the microstructure and properties of Fe-based friction materials synthesized by in situ carbothermic reaction from vanadium-bearing titanomagnetite concentrates

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