The Effect of Micro Tools Fabricated Dent on Alumina/Alumina Oxide Interface
The tribological outcomes of micro dent are found to be outstanding in many engineering and natural surfaces. Ceramic (Al2O3) is considered one of the most potential material to bearing surfaces particularly, artificial hip or knee implant. A well-defined micro dent on alumina oxide interface could further decrease friction and wear rate, thus increase their stability and durability. In this study we fabricated circular micro dent surface profiles (Dia: 400µm, Depth 20µm, P: 1.5mm; Dia: 400µm, Depth 20µm, P: 2mm) on pure Al2O3 (99.6%) substrate by using a micro tool machines. A preliminary tribological experiment was carried out to compare friction coefficient of these fabricated dent surfaces with that of non-textured surfaces. The experiment was carried on well know pin-on-disk specimens while other experimental parameters such as hertz pressure, speed, lubrication, and temperature were maintained to standard of simulated hip joints condition. The experiment results revealed that micro dent surface texture reduced 15%, 8% and 4% friction coefficient under 0.132,0.162, 0.187 GPa contact pressure respectively. Since this is a preliminary tribological study, we will pursue further experiments considering higher ranges of dent profiles and longer run experiments. However, the preliminary results confirmed the suitability of fabricating dent profile to ceramic surfaces by using micro tooling, and also their improved tribological performance in simulated hip joints.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1088818Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1983
 Sawano, H., S.i. Warisawa, and S. Ishihara, Study on long life of artificial joints by investigating optimal sliding surface geometry for improvement in wear resistance. Precision Engineering, 2009. 33(4): p. 492-498.
 Shum, P., Z. Zhou, and K. Li, To increase the hydrophobicity and wear resistance of diamond-like carbon coatings by surface texturing using laser ablation process. Thin Solid Films, 2013.
 Gao, L., et al., Effect of surface texturing on the elastohydrodynamic lubrication analysis of metal-on-metal hip implants. Tribology International, 2010. 43(10): p. 1851-1860.
 Jiang, X.J. and D.J. Whitehouse, Technological shifts in surface metrology. CIRP Annals - Manufacturing Technology, 2012. 61(2): p. 815-836.
 Qiu, Y. and M. Khonsari, Experimental investigation of tribological performance of laser textured stainless steel rings. Tribology International, 2011. 44(5): p. 635-644.
 Qian, S., et al., Generating micro-dimples array on the hard chrome-coated surface by modified through mask electrochemical micromachining. The International Journal of Advanced Manufacturing Technology, 2010. 47(9-12): p. 1121-1127.
 Huang, W., et al., The lubricant retaining effect of micro-dimples on the sliding surface of PDMS. Tribology International, 2012.
 Kovalchenko, A., et al., The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact. Tribology International, 2005. 38(3): p. 219-225.
 Meng, F., et al., Study on effect of dimples on friction of parallel surfaces under different sliding conditions. Applied surface science, 2010. 256(9): p. 2863-2875.
 Wang, X., et al., Loads carrying capacity map for the surface texture design of SiC thrust bearing sliding in water. Tribology International, 2003. 36(3): p. 189-197.
 Wakuda, M., et al., Effect of surface texturing on friction reduction between ceramic and steel materials under lubricated sliding contact. Wear, 2003. 254(3): p. 356-363.
 Hu, T., L. Hu, and Q. Ding, Effective solution for the tribological problems of Ti-6Al-4V: Combination of laser surface texturing and solid lubricant film. Surface and Coatings Technology, 2012.
 Kovalchenko, A., et al., Friction and wear behavior of laser textured surface under lubricated initial point contact. Wear, 2011. 271(9): p. 1719-1725.
 Li, J., F. Zhou, and X. Wang, Modify the friction between steel ball and PDMS disk under water lubrication by surface texturing. Meccanica, 2011. 46(3): p. 499-507.
 Li, J., et al., Tribological Properties of Laser Surface Texturing and Molybdenizing Duplex-treated Stainless Steel at elevated temperatures. Surface and Coatings Technology, 2012.
 Bergmann, G., et al., Hip contact forces and gait patterns from routine activities. Journal of biomechanics, 2001. 34(7): p. 859-871.
 Mow, V.C. and R. Huiskes, Basic orthopaedic biomechanics and mechano-biology. 2005: Lippincott Williams & Wilkins.
 Mattei, L., et al., Lubrication and wear modelling of artificial hip joints: A review. Tribology International, 2011. 44(5): p. 532-549.
 Myant, C., et al., Lubrication of metal-on-metal hip joints: The effect of protein content and load on film formation and wear. Journal of the Mechanical Behavior of Biomedical Materials, 2012. 6: p. 30-40.
 Ito, H., et al., Reduction of polyethylene wear by concave dimples on the frictional surface in artificial hip joints. The Journal of Arthroplasty, 2000. 15(3): p. 332-338.