Abstract
Boric acid is a lamellar solid lubricant that can give an ultra-low friction coefficient. The origin of this ultra-low friction of boric acid was investigated using tribology and spectroscopy techniques in inert, humid, and organic vapor conditions. It was found that boric acid itself experiences high friction and catastrophic surface wear when rubbed with a stainless steel ball in dry nitrogen or oxygen environments, but it gives very low friction (µ = 0.06) in humid and acetone vapor environments. Short-chain alcohol vapors (ethanol and n-pentanol) did not show these ultra-low friction values. Vibrational spectroscopy indicates that the lubricating vapors do not adsorb on the basal plane of the boric acid crystal but likely adsorb onto the edge sites of the lamella. The alcohol molecules impinging from the gas phase readily react with the boric acid to form a high vapor pressure molecule that desorbs from the surface. The “unlocking” of the high-energy edge sites by adsorbed acetone and water vapor appears to be needed for the lamella to shear along the basal plane direction.
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Dienwiebel, M., Pradeep, N., Verhoeven, G.S., Zandbergen, H.W., Frenken, J.W.: Model experiments of superlubricity of graphite. Surf. Sci. 576, 197–211 (2005)
Huang, H., Tu, J., Gan, L., Li, C.: An investigation on tribological properties of graphite nanosheets as oil additive. Wear 261, 140–144 (2006)
Gansheimer, J., Holinski, R.: Molybdenum disulfide in oils and greases under boundary conditions. J. Tribol. 95, 242–246 (1973)
Roberts, E.: Ultralow friction films of MoS < sub > 2 </sub > for space applications. Thin Solid Films 181, 461–473 (1989)
Erdemir, A., Fenske, G., Erck, R.: A study of the formation and self-lubrication mechanisms of boric acid films on boric oxide coatings. Surf. Coat. Technol. 43, 588–596 (1990)
Erdemir, A., Bindal, C., Fenske, G.: Formation of ultralow friction surface films on boron carbide. Appl. Phys. Lett. 68, 1637–1639 (1996)
Bindal, C., Erdemir, A.: Ultralow friction behavior of borided steel surfaces after flash annealing. Appl. Phys. Lett. 68, 923–925 (1996)
Erdemir, A., Halter, M., Fenske, G.: Preparation of ultralow-friction surface films on vanadium diboride. Wear 205, 236–239 (1997)
Erdemir, A., Eryilmaz, O., Fenske, G.: Self-replenishing solid lubricant films on boron carbide. Surf. Eng. 15, 291–295 (1999)
Erdemir, A.: Review of engineered tribological interfaces for improved boundary lubrication. Tribol. Int. 38, 249–256 (2005)
Sawyer, W.G., Ziegert, J.C., Schmitz, T.L., Barton, T.: In situ lubrication with boric acid: powder delivery of an environmentally benign solid lubricant. Tribol. Trans. 49, 284–290 (2006)
Deshmukh, P., Lovell, M., Sawyer, W.G., Mobley, A.: On the friction and wear performance of boric acid lubricant combinations in extended duration operations. Wear 260, 1295–1304 (2006)
Shah, F.U., Glavatskih, S., Antzutkin, O.N.: Boron in tribology: from borates to ionic liquids. Tribol. Lett. 51, 281–301 (2013)
Savage, R.H.: Graphite lubrication. J. Appl. Phys. 19, 1–10 (1948)
Savage, R.H., Schaefer, D.: Vapor lubrication of graphite sliding contacts. J. Appl. Phys. 27, 136–138 (1956)
Winer, W.O.: Molybdenum disulfide as a lubricant: a review of the fundamental knowledge. Wear 10, 422–452 (1967)
Donnet, C., Martin, J., Le Mogne, T., Belin, M.: Super-low friction of MoS < sub > 2 </sub > coatings in various environments. Tribol. Int. 29, 123–128 (1996)
Voevodin, A., Zabinski, J.: Supertough wear-resistant coatings with ‘chameleon’surface adaptation. Thin Solid Films 370, 223–231 (2000)
Barthel, A.J., Kim, S.H.: Lubrication by physisorbed molecules in equilibrium with vapor at ambient condition-effects of molecular structure and substrate chemistry. Langmuir 30(22), 6469–6478 (2014)
Barthel, A.J., Al-Azizi, A., Surdyka, N.D., Kim, S.H.: Effects of gas or vapor adsorption on adhesion, friction, and wear of solid interfaces. Langmuir 30, 2977–2992 (2013)
Yen, B.K., Schwickert, B.E., Toney, M.F.: Origin of low-friction behavior in graphite investigated by surface X-ray diffraction. Appl. Phys. Lett. 84, 4702–4704 (2004)
Voevodin, A., Phelps, A., Zabinski, J., Donley, M.: Friction induced phase transformation of pulsed laser deposited diamond-like carbon. Diam. Relat. Mater. 5, 1264–1269 (1996)
Khare, H., Burris, D.: The effects of environmental water and oxygen on the temperature-dependent friction of sputtered molybdenum disulfide. Tribol. Lett. 52, 485–493 (2013)
Khare, H., Burris, D.: Surface and subsurface contributions of oxidation and moisture to room temperature friction of molybdenum disulfide. Tribol. Lett. 53, 329–336 (2014)
Levita, G., Cavaleiro, A., Molinari, E., Righi, M.C., Polcar, T.: Sliding properties of MoS2 layers: load and interlayer orientation effects. J. Phys. Chem. C 118(25), 13809–13816 (2014)
Onodera, T., Morita, Y., Suzuki, A., Koyama, M., Tsuboi, H., Hatakeyama, N., Endou, A., Takaba, H., Kubo, M., Dassenoy, F.: A computational chemistry study on friction of h-MoS2. Part I. Mechanism of single sheet lubrication. J. Phys. Chem. B 113, 16526–16536 (2009)
Martin, J.-M., Donnet, C., Le Mogne, T., Epicier, T.: Superlubricity of molybdenum disulphide. Phys. Rev. B 48, 10583 (1993)
Ma, X., Unertl, W., Erdemir, A.: The boron oxide–boric acid system: nanoscale mechanical and wear properties. J. Mater. Res. 14, 3455–3466 (1999)
Barthel, A., Gregory, M., Kim, S.: Humidity effects on friction and wear between dissimilar metals. Tribol. Lett. 48, 305–313 (2012)
Barnette, A.L., Bradley, L.C., Veres, B.D., Schreiner, E.P., Park, Y.B., Park, J., Park, S., Kim, S.H.: Selective detection of crystalline cellulose in plant cell walls with sum-frequency-generation (SFG) vibration spectroscopy. Biomacromolecules 12, 2434–2439 (2011)
Lee, C.M., Mohamed, N.M., Watts, H.D., Kubicki, J.D., Kim, S.H.: Sum-frequency-generation vibration spectroscopy and density functional theory calculations with dispersion corrections (DFT-D2) for cellulose Iα and Iβ. J. Phys. Chem. B 117, 6681–6692 (2013)
Zachariasen, W.: The crystal lattice of boric acid, BO3H3. Zeitschrift für Kristallographie-Crys. Mater. 88, 150–161 (1934)
Cowley, J.: Structure analysis of single crystals by electron diffraction. II. Disordered boric acid structure. Acta Crystallogr. A 6, 522–529 (1953)
Dowson, D.: History of Tribology. Longman, London (1979)
Anderson, S., Bohon, R.L., Kimpton, D.D.: Infrared spectra and atomic arrangement in fused boron oxide and soda borate glasses. J. Am. Ceram. Soc. 38, 370–377 (1955)
Bethell, D., Sheppard, N.: The infra-red spectrum and structure of boric acid. Trans. Faraday Soc. 51, 9–15 (1955)
Hornig, D.F., Plumb, R.: Vibrational spectra of molecules and complex ions in crystals. IX. Boric Acid. J. Chem. Phys. 26, 637–641 (1957)
Servoss, R., Clark, H.: Vibrational spectra of normal and isotopically labeled boric acid. J. Chem. Phys. 26, 1175–1178 (1957)
Krishnan, K. In: The Raman spectrum of boric acid, Proceedings of the Indian Academy of Sciences-Section A, 1963; Springer, pp 103–108 (1963)
Greenler, R.G.: Infrared study of adsorbed molecules on metal surfaces by reflection techniques. J. Chem. Phys. 44, 310 (1966)
Greenler, R.G.: Reflection method for obtaining the infrared spectrum of a thin layer on a metal surface. J. Chem. Phys. 50, 1963 (1969)
Broadhead, P., Newman, G.: The vibrational spectra of orthoboric acid and its thermal decomposition products. J. Mol. Struct. 10, 157–172 (1971)
Broadhead, P., Newman, G.: OH groups and hydrogen bonding in some boron-oxygen compounds. Spectrochim. Acta A 28, 1915–1923 (1972)
Parsons, J., Milberg, M.: Vibrational spectra of vitreous B2O3·xH2O. J. Am. Ceram. Soc. 43, 326–330 (1960)
Ewing, G.E.: Thin film water. J. Phys. Chem. B 108, 15953–15961 (2004)
Asay, D.B., Kim, S.H.: Evolution of the adsorbed water layer structure on silicon oxide at room temperature. J. Phys. Chem. B 109, 16760–16763 (2005)
Zhang, S., Zhao, D.: Aerospace Materials Handbook. CRC Press, Boca Raton (2012)
Bradley, L.C., Dilworth, Z.R., Barnette, A.L., Hsiao, E., Barthel, A.J., Pantano, C.G., Kim, S.H.: Hydronium ions in soda-lime silicate glass surfaces. J. Am. Ceram. Soc. 96, 458–463 (2013)
Pimentel, G.C.: McClella.Al: hydrogen bonding. Annu. Rev. Phys. Chem. 22, 347 (1971)
Domi, Y., Ochida, M., Tsubouchi, S., Nakagawa, H., Yamanaka, T., Doi, T., Abe, T., Ogumi, Z.: In situ AFM study of surface film formation on the edge plane of hopg for lithium-ion batteries. J. Phys. Chem. C 115, 25484–25489 (2011)
Yuan, W., Zhou, Y., Li, Y., Li, C., Peng, H., Zhang, J., Liu, Z., Dai, L., Shi, G.: The edge- and basal-plane-specific electrochemistry of a single-layer graphene sheet. Sci. Rep. 3, 2248 (2013). doi:10.1038/srep02248
Dienwiebel, M., Verhoeven, G.S., Pradeep, N., Frenken, J.W., Heimberg, J.A., Zandbergen, H.W.: Superlubricity of graphite. Phys. Rev. Lett. 92, 126101 (2004)
Ong, T.S., Yang, H.: Effect of atmosphere on the mechanical milling of natural graphite. Carbon 38, 2077–2085 (2000)
Radisavljevic, B., Radenovic, A., Brivio, J., Giacometti, V., Kis, A.: Single-layer MoS2 transistors. Nat. Nano. 6, 147–150 (2011)
Hao, G., Huang, Z., Liu, Y., Qi, X., Ren, L., Peng, X., Yang, L., Wei, X., Zhong, J.: Electrostatic properties of few-layer MoS2 films. AIP Adv. 3(4), 042125 (2013)
Shi, Y., Huang, J.-K., Jin, L., Hsu, Y.-T., Yu, S. F., Li, L.-J., Yang, H. Y.: Selective Decoration of Au Nanoparticles on Monolayer MoS2 Single Crystals. Sci. Rep. 3, 1839 (2013). doi:10.1038/srep01839
Zhao, X., Perry, S.S.: The role of water in modifying friction within MoS2 sliding interfaces. ACS Appl. Mater. Interfaces 2, 1444–1448 (2010)
Peak, D., Luther III, G.W., Sparks, D.L.: ATR-FTIR spectroscopic studies of boric acid adsorption on hydrous ferric oxide. Geochim. Cosmochim. Acta 67, 2551–2560 (2003)
Coblentz Society Inc., Evaluated Infrared Reference Spectra in NIST Chemistry WebBook, NIST Standard Reference Database Number 69, Eds. Linstrom, P.J., and Mallard, W.G., National Institute of Standards and Technology, Gaithersburg MD, 20899, http://webbook.nist.gov, (retrieved November 20, 2014)
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This work was financially supported by the National Science Foundation (Grant Nos. CMMI-1000021 and 1131128).
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Barthel, A.J., Luo, J. & Kim, S.H. Origin of Ultra-Low Friction of Boric Acid: Role of Vapor Adsorption. Tribol Lett 58, 40 (2015). https://doi.org/10.1007/s11249-015-0512-7
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DOI: https://doi.org/10.1007/s11249-015-0512-7