Advertisement

Characterization of DC Magnetron Sputtered Copper Thin Film on Aluminium Touch Surface

  • Arun AugustinEmail author
  • K. Rajendra Udupa
  • K. Udaya Bhat
Technical Paper
  • 12 Downloads

Abstract

Hospital care-assisted infections introduce problems like prolonged hospital stay, additional financial burden and higher death rate. Since copper is registered by US Environmental Protection Agency as the only solid antimicrobial metal, it could be used in hospital touch surfaces. In the present work, copper has been deposited on the aluminium substrate by DC magnetron sputtering method with different target power. Prior to the coating, the substrate has undergone double zincation process. The coating has been characterized by XRD, SEM, TEM, scratch hardness test and microhardness test. From the TEM micrographs, the grain size has been found to decrease from 49 to 18 nm on increasing the deposition power from 50 to 150 W. Along with the decrease in the grain size, the mechanical properties like scratch hardness and microhardness of the coating have been increased. The preferred growth along [111] direction observed in XRD analysis is responsible for the increase in the hardness of the coating apart from the presence of the nano-grains. The SEM image of the coating shows nodular morphology which enhances the surface area.

Keywords

Sputtering Copper coating Microstructural characterization Nano-grains 

Notes

References

  1. 1.
    Warnes S, Caves V, and Keevil C, Environ Microbiol 14 (2012) 1730.CrossRefGoogle Scholar
  2. 2.
    Marais F, Mehtar S, and Chalkley L, J Hosp Infect 74 (2010) 80.CrossRefGoogle Scholar
  3. 3.
    Molteni C, Abicht HK, and Solioz M, Appl Environ Microbiol 76 (2010) 4099.CrossRefGoogle Scholar
  4. 4.
    Grass G, Rensing C, and Solioz M, Appl Environ Microbiol 77 (2011) 1541.CrossRefGoogle Scholar
  5. 5.
    http://www.antimicrobialcopper.org, (Accessed on 08-08-2018).
  6. 6.
    Lu L, Sui M, and Lu K, Science 287 (2000) 1463.CrossRefGoogle Scholar
  7. 7.
    Sanders P G, Eastman J A, and Weertman J R, Acta Mater 45 (1997) 4019.CrossRefGoogle Scholar
  8. 8.
    Navinšek B, Panjan P, and Milošev I, Surf Coat Technol 116 (1999) 476.CrossRefGoogle Scholar
  9. 9.
    Augustin A, Udupa K R, and Bhat U, Am J Mater Sci 5 (2015) 58.Google Scholar
  10. 10.
    Mattox D, Handbook of Physical Vapor Deposition Processing-Film Formation, Adhesion, Surface Preparation and Contamination Control. Society of Vacuum Coaters, William Andrew, Norwich (1998).Google Scholar
  11. 11.
    Ohring M, Materials Science of Thin Films, 2nd edn., Academic Press, Cambridge (2001).Google Scholar
  12. 12.
    Kang S W, Yun J Y, and Rhee S W, J Electrochem Soc 149 (2002) C33.CrossRefGoogle Scholar
  13. 13.
    Augustin A, Huilgol P, Udupa K R, and Bhat U, J Mech Behav Biomed Mater 63 (2016) 352.CrossRefGoogle Scholar
  14. 14.
    Zhou X W, and Wadley H N G, Acta Mater 47 (1999) 1063.CrossRefGoogle Scholar
  15. 15.
    Beegan D, Chowdhury S, and Laugier M, Surf Coat Technol 201 (2007) 5804.CrossRefGoogle Scholar
  16. 16.
    Hansen N, Scr Mater 51 (2004) 801.CrossRefGoogle Scholar
  17. 17.
    Zhang X, Misra A, and Wang H, Appl Phys Lett 84 (2004) 1096.CrossRefGoogle Scholar
  18. 18.
    Lu L, Schwaiger R, and Shan Z W, Acta Mater 53 (2005) 2169.CrossRefGoogle Scholar
  19. 19.
    Love A E H, A Treatise on the Mathematical Theory of Elasticity, 4th edn., Dover Publications, New York (1944).Google Scholar
  20. 20.
    Bahk S, Suwas S, and Chatterjee K, RSC Adv 4 (2014) 38078.CrossRefGoogle Scholar

Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringChrist College of Engineering IrinjalakudaThrissurIndia
  2. 2.Department of Metallurgical and Materials EngineeringNational Institute of Technology KarnatakaSrinivasnagar, MangaloreIndia

Personalised recommendations