range of 350 to 400 C (662 to 752 F). Videos Design Manufacture to access the full features of the site or access our, College of Mechanical Engineering, Donghua University, Shanghai 201620, China, Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Donghua University, Shanghai 201620, China, College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 211100, China, School of Mechanical Engineering, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China. (a) Oleic acid; (b) Atlantic spindle oil (light mineral); (c) castor oil; (d) lard oil; (e) Atlantic spindle oil plus 2 percent oleic acid; (f) medium mineral oil; (g) medium mineral oil plus percent oleic acid; (h) stearic acid; (i) grease (zinc oxide base); (j) graphite; (k) turbine oil plus 1 percent graphite; (l) turbine oil plus 1 percent stearic acid; (m) turbine oil (medium mineral); (n) olive oil; (p) palmitic acid; (q) ricinoleic acid; (r) dry soap; (s) lard; (t) water; (u) rape oil; (v) 3-in-1 oil; (w) octyl alcohol; (x) triolein; (y) 1 percent lauric acid in paraffin oil. volume65, Articlenumber:79 (2017) With the increase of MoS 2 content, the microstructure is gradually refined; the hardness gradually increases; the friction coefficient first decreases and then increases, and when the MoS 2 content is 5%, the friction coefficient is at least 0.55; the wear volume first decreases and then increases, and the MoS 2 addition amount is 5% When the . Tribol. According to the direct methods of shear strength's measurement, the value is near 25.3 MPa. x Int. Inorg. [57]. Sci. [17], Liquid-phase exfoliation can also be used to produce monolayer to multi-layer MoS2 in solution. Friction and Wear Mechanism of MoS2/C Composite Coatings Under Appl. 3, Effect of Environment on Microstructure Evolution and Friction of AuNi Multilayers, Multiscale study of the dynamic friction coefficient due to asperity plowing, Temperature dependence of molybdenum dialkyl dithiocarbamate (MoDTC) tribofilms via time-resolved Raman spectroscopy, https://core.ac.uk/download/pdf/42803573.pdf, https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930083852.pdf, http://ntrs.nasa.gov/search.jsp?R=19790004987, https://ntrs.nasa.gov/search.jsp?R=19790004988, https://ntrs.nasa.gov/search.jsp?R=19970003296, https://doi.org/10.1016/j.mattod.2020.09.036, http://creativecommons.org/licenses/by/4.0/. 53, 329336 (2014), Zhao, X.Y., Perry, S.S.: The role of water in modifying friction within MoS2 sliding interfaces. : The role of humidity and oxygen on MoS2 thin films deposited by RF PVD magnetron sputtering. Molybdenum Disulfide (MoS2) Coatings Lubrication Review - Engineers Edge Tribol Lett 69, 96 (2021). PEEM measurements were conducted using a LEEM-III system (Elmitec Elektronenmikroskopie GmbH) coupled to a continuous-wave (CW), tunable wavelength light source based on a Xe lamp. 77, 38653868 (1996), Grimme, S., Ehrlich, S., Goerigk, L.: Effect of the damping function in dispersion corrected density functional theory. Tribol. It suggested that the shear plane was mainly made of well-ordered MoS2 transfer film, while carbon improved the mechanical properties of the coatings, served as a lubricant and also inhibited the oxidation of MoS2. Phys. Tribol. : Long-term stability of mechanically exfoliated MoS2 flakes. D Appl. Appl. It is widely used as a dry lubricant because of its low friction and robustness. Machine Design Apps She received her bachelor in Qufu Normal University and majored in chemistry. It is unlikely that there is an appreciable amount of oxidation at the surface of the wear scar [45], and it is more likely to find MoO3 in the surrounding as-deposited film, but as others have shown, these films do not typically undergo appreciable oxidation during storage in dry N2 [38]. Surf. Lett. A variety of oils and greases are used, because they retain their lubricity even in cases of almost complete oil loss, thus finding a use in critical applications such as aircraft engines. Interactions between water molecules and unterminated edges of MoS2 lamellae have also been suggested as an impediment to low-strength shear [33]. Molybdenum Disulfide (MoS2) Coating on AISI 316 Stainless Steel by The compound is classified as a transition metal dichalcogenide. Macromol Symp 376(1): 1700009 (2017), Wang M, Li G D, Xu H Y, Qian Y T, Yang J. ACS Appl. J. Vac. If you are the author of this article, you do not need to request permission to reproduce figures The average yield strength of monolayer MoS2 is 23 GPa, which is close to the theoretical fracture strength for defect-free MoS2. You can use material from Fominski, V. N. Nevolin, M. D. Gritskevich, Alper zoul, Benedykt R. Jany, Mehmet Z. Baykara, Germn Prieto, Bruno Pilotti, Mariana Dennehy, Ebru Cihan, Katherine Jungjohann, Martin Dienwiebel, Carlos E. Garcia, Mao Ueda, Janet S. S. Wong, Tribology Letters B. Shi, X. Gan, H. Lang, K. Zou, L. Wang, J. Kelvin Probe Force Microscopy: From Single Charge Detection to Device Characterization, pp. High purity MoS2 and Ti targets (Angstrom Sciences) were used to produce 650nm thick MoS2 films on top of a 75nm Ti adhesion layer at 200W and 300W bias voltages on 1 cm2 Si wafers. Structural Shapes Paste Benefits Moly Fortification Explained Molybdenum Disulfide is an ideal lubricant because of its familiar crystalline structure which allows molecules to shear, creating an exceedingly low coefficient of friction between coated surfaces. Fabrication of the g-C3N4/Cu nanocomposite and its potential for lubrication applications. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Peoples Republic of China, Sheng Cai,Peng Guo,Jingzhou Liu,Dong Zhang,Peiling Ke&Aiying Wang, Ningbo University, Ningbo, 315211, Peoples Republic of China, You can also search for this author in the presence of iron oxide nanoparticles lubricating . This approach can provide an additional channel to achieve ultra-low friction on MoS2 related two-dimensional materials with semiconductor properties. The debris surrounding the wear scars, conversely, shows a decrease in work function by a similar magnitude (0.100.25eV) relative to the as-deposited film. Tribol. [24], In recent years, MoS2 has been utilized in flexible electronic applications, promoting more investigation into the elastic properties of this material. To understand friction and wear mechanism, multiple analytical tools such as SEM, EDS, Raman, XPS and TEM were applied to investigate the composition and structure. It is unaffected by dilute acids and oxygen. Maps of the vacuum level were obtained by fitting the spectra at each pixel. Tribol. Tribol Int 29(2): 123128 (1996), Berman D, Erdemir A, Sumant A V. Approaches for achieving superlubricity in two-dimensional materials. Curry, J.F., Ohta, T., DelRio, F.W. Sci. 0.22. Interlayer sliding dissipates energy when a shear stress is applied to the material. MoS2 is also used in CV and universal joints. This directly prevents the transition to the desirable low friction state. In fact, adsorbed vapors may actually result in a slight, but insignificant, increase in friction. Lett. Mechanical Tolerances Specs Microindentation experiments on nanopillars of Cr-doped MoS2 found that the yield strength increased from an average of 821 MPa for pure MoS2 (at 0% Cr) to 1017 MPa at 50% Cr. Surf. 23, 371389 (1990), Levita, G., Righi, M.C. However, it can not be employed for a uniform 1-D layers because of weaker adhesion of MoS2 to the substrate (either Si, glass or quartz). ACS Nano 9, 30233031 (2015), Kozbial, A., Gong, X., Liu, H., Li, L.: Understanding the intrinsic water wettability of molybdenum disulfide (MoS2). Surf. The combination of PEEM and KPFM enabled a quantitative approach to characterize structural differences in the first few monolayers of macroscale wear tracks through measurements of work function at the surface. Chem. The authors are grateful to the National Natural Science Foundation of China (Grant Nos. 57, 995997 (1990), Gul, A., Bacaksiz, C., Unsal, E., Akbali, B.: Theoretical and experimental investigation of conjugation of 1, 6-hexanedithiol on MoS2. If material is not included in the articles Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, China, Yupeng Zhang,Panpan Li,Li Ji,Xiaohong Liu,Hongqi Wan,Lei Chen&Hongxuan Li, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Science, Beijing, 100049, China, Panpan Li,Li Ji,Xiaohong Liu,Hongqi Wan,Lei Chen&Hongxuan Li, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, 750021, China, You can also search for this author in Compos Part A Appl Sci Manuf 113: 200208 (2018), Yang J, Zhang H T, Chen B B, Tang H, Li C S, Zhang Z Z. Tribol. Tribological testing was conducted on a custom built linear-reciprocating microtribometer [41,42,43]. J. Electric Motor Alternators Further work is necessary to develop quantitative characterization techniques to accurately probe changes in surface microstructure for the thicker films representative of running contacts. volume9,pages 789801 (2021)Cite this article. where t is the work function of the tip and e is the elementary charge [54]. provided correct acknowledgement is given. Phys. https://doi.org/10.1007/s11249-017-0862-4, DOI: https://doi.org/10.1007/s11249-017-0862-4. Technol. Self-lubricating composite coatings for high-temperature applications consist of molybdenum disulfide and titanium nitride, using chemical vapor deposition. In 2006, he obtained his Ph.D. degree from LICP-CAS. The Tribological Mechanism of MoS2 Film under Different Humidity J Tribol 140(5): 051303 (2018), Li X, Li J H, Wang X H, Hu J X, Fang X, Chu X Y, Wei Z P, Shan J J, Ding X C. Preparation, applications of two-dimensional graphene-like molybdenum disulfide. ACS Appl. volume69, Articlenumber:96 (2021) There have been several recent reports that show how the work function of single and multilayer MoS2 systems are influenced by strain/defect density [71], oxidation state [72, 73], layer thickness and adsorbates [74, 75], as well as how work function varies across the surface of lamellae from edge to center [76, 77]. ACS Appl. please go to the Copyright Clearance Center request page. He is a researcher and doctoral supervisor in LICP-CAS. 2a). : Impact of microstructure on MoS2 oxidation and friction. Beilstein J. Nanotechnol. The formation of a basally oriented film with long range order is an important part of the run-in process for MoS2 coatings and is frequently observed in initially amorphous PVD sputtered films [61, 62]. Thin Solid Films 154, 309322 (1987), Lince, J.R., Fleischauer, P.D. AIP Adv. He is the director of the Key Laboratory of Chemical Technology Foundation of the National Civil Affairs Commission, director of the Ningxia Key Laboratory of Solar Chemical Conversion Technology. B 59, 17581775 (1999), Kresse, G., Furthmller, J.: Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. 112, 013511 (2012), Curry, J.F., et al. Surf. Enhanced lithium storage performances of hierarchical hollow MoS2 nanoparticles assembled from nanosheets. Engineering Forum Technol. U1637204, 41663012, 51775537, and 51775533), the program of the Light of the Chinese Academy of Science in Chinas Western Region (2015), and the Chinese Academy of Science and its Youth Innovation Promotion Association (2016368) for financial support. Moly grease and moly paste | McLube Industrial Lubricants 2023 Springer Nature Switzerland AG. : Space environmental effects on MoS2 and diamond-like carbon lubricating films: atomic oxygen-induced erosion and its effect on tribological properties. ACS Appl Mater Interfaces 5(3): 10031008 (2013), Hou K M, Han M M, Liu X H, et al. 150, 255262 (1999), Singer, I.L., Bolster, R.N., Wegand, J., Fayeulle, S., Stupp, B.C. Cast iron on asbestos, fabric brake material. Influence of reciprocating friction on friction and wear The cleavage of these flakes was also determined to be reversible due to the nature of van der Waals bonding. Dalton Trans 43(17): 62956299 (2014), Wang J, Liu J L, Chao D L, Yan J X, Lin J Y, Shen Z X. Self-assembly of honeycomb-like MoS2 nanoarchitectures anchored into graphene foam for enhanced lithium-ion storage. npj D Mater. Technol. Anyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. Review of engineered tribological interfaces for improved boundary lubrication. 1e, the defect-free systems exhibited the lowest friction coefficients. 59, 889892 (1955), Haltner, A.J., Oliver, C.S. The low friction coefficient caused by heavy load or high velocity could be maintained with a decrease in load or velocity. Sci. your institution. ACS Nano 14, 1479814808 (2020), Shakya, J., Kumar, S., Kanjilal, D., Mohanty, T.: Work function modulation of molybdenum disulfide nanosheets by introducing systematic lattice strain. All experiments used a 1mm diameter ruby ball with a sliding speed of 1mm/s. Meanwhile, a low friction coefficient (COF, = 0.031) and ultra-long wear-life of CN/MoS2 compared to pure MoS2 in air were demonstrated. Meanwhile, a low friction coefficient (COF, = 0.031) and ultra-long wear-life of CN/MoS2 compared to pure MoS2 in air were demonstrated. 53, 329336 (2014), Khare, H.S., Burris, D.L. Friction experiments in different environments (dry N2 vs 50% RH N2) were used to validate simulation results (Fig. C. R. Chim. Except where otherwise noted, data are given for materials in their, "Anisotropic mean-square displacements (MSD) in single-crystals of 2H- and 3R-MoS, "Exploring atomic defects in molybdenum disulphide monolayers", "1T-MoS2, a new metallic modification of molybdenum disulfide", "2H/1T Phase Transition of Multilayer MoS 2 by Electrochemical Incorporation of S Vacancies", "Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: An in Situ TEM Study", "Nanomechanical cleavage of molybdenum disulphide atomic layers", "Stretching and Breaking of Ultrathin MoS2", High Performance, Dry Powdered Graphite with sub-micron molybdenum disulfide, "Barrels retain accuracy longer with Diamond Line", "Physics Duo Finds Magic in Two Dimensions", "Building an appropriate active-site motif into a hydrogen-evolution catalyst with thiomolybdate [Mo, "Superior hydrogen catalyst just grows that way", "Robust wrinkled MoS 2 /N-C bifunctional electrocatalysts interfaced with single Fe atoms for wearable zinc-air batteries", "Electronics and optoelectronics of two-dimensional transition metal dichalcogenides", "Ultrasensitive photodetectors based on monolayer MoS, "Ultrasensitive biosensor from molybdenite semiconductor outshines graphene", "Two-dimensional flexible nanoelectronics", "A microprocessor based on a two-dimensional semiconductor", "Memtransistors advance neuromorphic computing | NextBigFuture.com", "Control of valley polarization in monolayer MoS2 by optical helicity", "Intrinsic valley Hall transport in atomically thin MoS2", "Metal-based graphene alternative "shines" with promise", "Electric-field-induced superconductivity at 9.4 K in a layered transition metal disulphide MoS2", https://en.wikipedia.org/w/index.php?title=Molybdenum_disulfide&oldid=1151416829, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 23 April 2023, at 22:47. His research interests include special adhesives and functional coating materials. MoS2 with particle sizes in the range of 1100 m is a common dry lubricant. Check out these structural calculators: Beam Analysis Bolted Joints Lug Analysis Column Buckling. Sci. This work was funded by the Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories, a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energys National Nuclear Security Administration under contract DE-NA0003525. Raman spectroscopy has been used recently to assess defect density as well as lamellae size in MoS2 [68,69,70], but again with limited depth-resolution. Khare and Burris recently showed that below a temperature threshold of 100C, higher friction in the presence of water vapor is likely associated either with the physisorption of environmental water or effusion from the bulk [16]. These three strata form a monolayer of MoS2. Lett. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. MoS2 is applied to bearings in ultra-high vacuum applications up to 109 torr (at 226 to 399 C). Flakes with more than 20 layers exhibited a kinking mechanism during micromechanical cleavage. : Synthesis of AuMoS2 nanocomposites: thermal and friction-induced changes to the structure. The sensitivity of a graphene field-effect transistor (FET) biosensor is fundamentally restricted by the zero band gap of graphene, which results in increased leakage and reduced sensitivity. 2. Chem. The coefficient of static friction, typically denoted as s, is usually higher than the coefficient of kinetic friction. : Uncovering the effects of metal contacts on monolayer MoS2. Maps of the relative work function were determined by recording the photoelectron intensity as a function of the electron kinetic energy using monochromatic light illumination (185nm wavelength, 6.70eV) [56]. The ultra-low friction coefficient (typically in the 10 2 range) of MoS 2 -based coatings is generally associated with the friction-induced orientation of 'easy-shear' planes of the lamellar structure parallel to the sliding direction, particularly in the absence of environmental reactive gases and with moderate normal loads. Characterization via photoelectron emission microscopy (PEEM) and Kelvin probe force microscopy (KPFM) were used to determine work function changes in shear modified material within the top few nanometers of MoS2 wear scars. The results of the MD simulations suggest that the presence of water and molecular oxygen tend to interrupt interactions between lamellae, preventing formation of the multilayer, persistent basally oriented films that are associated with low friction in MoS2 lubricated contacts. It is often used in two-stroke engines; e.g., motorcycle engines. Physics J. Korean Phys. Structural and friction characteristics of g-C3N4/PVDF composites. Coat. Sci. The ultra-low friction state on atomically thin MoS2 is patterned further by controllably regulating position, time, and electric field during the rubbing process. Dipole corrections were used for the Z- direction (normal to the plane of MoS2). Results showed that the way of copper-coated on the surface of MoS2 could . 1). Technol. Few alternatives exist that can confer the high lubricity and stability up to 350 C in oxidizing environments. Lett. Tribological, oxidation and thermal conductivity studies of - Nature Grayscale maps of relative work function change in eV from PEEM measurements of selected wear tracks shown in Fig. In appearance and feel, molybdenum disulfide is similar to graphite.
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