Optimization of molecularly thin lubricant to improve bearing capacity at the head-disk interface

详细信息    查看全文

• 作者：Shahla Chowdhury ; Antonis I. Vakis ; Andreas A. Polycarpou
• 刊名：Microsystem Technologies
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：21
• 期：7
• 页码：1501-1511
• 全文大小：2,339 KB
• 参考文献：Archard JF (1958) The temperature of rubbing surfaces. Wear 2:438-55View Article
  Cho YK, Cai L, Granick S (1997) Molecular tribology of lubricants and additives. Tribol Int 30(12):889-94View Article
  Demirel AL, Granick S (1998) Transition from static to kinetic friction in a model lubricated system. J Chem Phys 109(16):6889-897View Article
  Deolalikar N, Sadeghi F (2008) Numerical modeling of mixed lubrication and flash temperature in EHL elliptical contacts. J Tribol. doi:10.-115/-.-805429 MATH
  DeVor RE, Chang TH, Sutherland JW (1992) Statistical quality design and control: contemporary concepts and methods. Prentice-Hall, Upper Saddle River
  Fisher LR, Israelachvili JN (1979) Direct experimental verification of the Kelvin equation for capillary condensation. Nature 277:548-49View Article
  Fukuzawa K, Hayakawa K, Matsumura N, Itoh S, Zhang H (2009) Simultaneously measuring lateral and vertical forces with accurate gap control for clarifying lubrication phenomena at nanometer gap. Tribol Lett 37(3):497-05View Article
  Greenwood JA, Williamson JB (1966) Contact of nominally flat surfaces. Proc R Soc. doi:10.-098/?rspa.-966.-242
  Guo XC, Marchon B, Wang RH, Mate CM, Dai Q, Waltman RJ, Deng H, Pocker D, Xiao QF, Saito Y, Ohtani T (2012) A multidentate lubricant for use in hard disk drives at sub-nanometer thickness. J Appl Phys 111:024503View Article
  Hiroshi T, Tagawa N (2012) Adhesion and friction properties of molecularly thin perfluoropolyether liquid films on solid surfaces. Langmuir 28:3814-820View Article
  Karis TE (2009) Lubricants for the disk drive industry. In: Rudnick L (ed) Lubricant additives: chemistry and applications, 2nd edn. CRC Press, FL, pp 523-84View Article
  Kogut L, Etsion I (2004) A static friction model for elastic-plastic contacting rough surfaces. J Tribol T ASME 126:34-0View Article
  Kunkel GH, Lou H, Macken D, Stoebe TW (2014) Resistance temperature sensors for head-media and asperity detection. Patent No: US 8,737,009 B2
  Lee SC, Polycarpou AA (2005) Microtribodynamics of pseudo-contacting head–disk interfaces intended for 1 Tbit/in2. IEEE Trans Magn 41(2):812-18View Article
  Lee SC, Strom BD (2008) Characterization of thermally actuated pole tip protrusion for head-media spacing adjustment in hard disk drives. J Tribol-T ASME 130(2):022001
  Marchon B, Saito Y (2009) Lubricant design attributes for subnanometer head-disk clearance. IEEE Trans Magn 45(2):872-76View Article
  Martini A, Hsu HY, Patankar NA, Lichter S (2008) Slip at high shear rates. Phys Rev Lett. doi:10.-103/?PhysRevLett.-00.-06001
  Mate CM, Lorenz MR, Novotny V, Sanders IL, Lin LJ (1989) Tribological studies of storage media by atomic force microscopy. IEEE GA-
  Muller VM, Yushchencko VS, Derjaguin BV (1980) On the influence of molecular forces on the deformation of an elastic sphere and its sticking to a rigid plane. J Coll Interface Sci 77(1):91-01View Article
  Persson BNJ (1997) Molecular tribology of lubricants and additives. Tribol Int 30(12):889-94View Article
  Rong J, Thomas L, Chong TC (2008) TOF-SIMS analysis for thermal effect study of hard disk lubricant. Appl Surface Sci 255(4):1490-493View Article
  Scarpulla MA, Mate CM (2003) Air shear driven flow of thin perfluoropolyether polymer films. J chem phys 118(7):3368-375View Article
  Seagate technology (2014), What is the normal operating temperature for seagate disk drives? http://?knowledge.?seagate.?com/?articles/?en_?US/?FAQ/-93771en . Accessed 20 March 2014
  Spikes HA, Olver AV (2009) Compression heating and cooling in elastohydrodynamic contacts. Tribol Lett 36(1):69-0View Article
  Stanley HM, Etsion I, Bogy DB (1990) Adhesion of contacting rough surfaces in the presence of sub-boundary lubrication. J Tribol 112(1):98-04View Article
  Suh AY, Polycarpou AA (2005) Adhesive contact modeling for sub-5-nm ultralow flying magnetic storage head-disk interfaces including roughness effects. J Appl Phys. doi:10.-063/-.-914951
  Suh AY, Polycarpou AA (2008) Design optimization of sub-5?nm head–disk interfaces using a two-degree-of-freedom dynamic contact model with friction. Int J Prod Dev 5(3-):268-91
  Suh AY, Mate CM, Payne RN, Polycarpou AA (2006) Experimental and theoretical evaluation of friction at contacting magnetic storage slider-disk interfaces. Tribol Lett 23(3):177-90View Article
  Vakis AI, Polycarpou AA (2010) Head-disk interface nanotribology for Tbit/in2 recording densities: near-contact and contact recording. J Phys D Appl Phys. doi:10.-088/-022-3727/-3/-2/-25301
  Vakis AI, Polycarpou AA (2012) Modeling sliding contact of rough surfaces with molecularly thin lubricant. Tribol Lett 45(1):37-8View Article
  Vakis AI, Polycarpou AA (2013) An advanced rough surface continuum-based contact and sliding model in the presence of molecularly thin lubricant. Tribol Lett 49(1):227-38View Article
  Vakis AI, Lee SC, Polycarpou AA (
• 作者单位：Shahla Chowdhury (1) (2)
  Antonis I. Vakis (1) (3)
  Andreas A. Polycarpou (1) (2)
  
  1. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Champaign, IL, 61801, USA
  2. Department of Mechanical Engineering, Texas A&M University, College Station, TX, 77843, USA
  3. Faculty of Mathematics and Natural Sciences, University of Groningen, 9747 AG, Groningen, The Netherlands
  
• 刊物类别：Engineering
• 刊物主题：Electronics, Microelectronics and Instrumentation
  Nanotechnology
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1858

文摘

A molecularly thin lubricant layer (of the order of 1-?nm thick) has been shown to provide bearing forces at the interface between contacting solid surfaces under light loads and high shear rates. This phenomenon is important, for example, in the head-disk contact in magnetic storage hard disk drives to ensure that some of the contact is sustained by the lubricant layer and thus avoiding damage of the solid surfaces. The magnitude of the normal and tangential bearing forces that the lubricant layer can provide depends on temperature, viscosity of the lubricant, sliding velocity and radius of gyration of the lubricant molecules. This study shows that viscosity has the greatest effect on the load bearing capacity of the molecularly thin lubricant. Thus, by controlling the flash temperature and the ratio of molecularly thin lubricant-to-bulk viscosity, the bearing load carrying capacity of the layer can be controlled. This would allow for the contact to be sustained within the mobile lubricant layer, avoiding solid contact so as to protect the diamond-like carbon coating, and thus reduce wear and potential catastrophic failures.