Skip to main content

Microhardness of anodic aluminum oxide formed in an alkaline electrolyte

Abstract

The microhardness of anodic aluminum oxide formed by anodizing of aluminum sheet in electrolyte on the basis of sodium hydroxide has been determined experimentally. The microhardness of the hard film/soft substrate system has been estimated by three approaches: indentation geometry (length of diagonals) in film surfaces, the sum of the hardnesses of the film and the surface with allowance for the indentation surface area and geometry, and with allowance for the indentation depth. It is demonstrated that the approach accounting for the indentation depth makes it possible to eliminate the influence of the substrate. It is established that the microhardness of the films formed in alkaline electrolytes is comparable with that formed in acid electrolytes.

This is a preview of subscription content, access via your institution.

References

  1. V. A. Sokol, “Electrochemical technology of microand nanoelectronic devices,” Dokl. BGUIR, No. 3, 18–26 (2004).

    Google Scholar 

  2. I. V. Roslyakov, K. S. Napol’skii, A. A. Eliseev, A. V. Lukashin, D. Yu. Chernyshov, and S. V. Grigor’ev, “Synthesis of magnetic nanoparticles with controlled anisotropy of functional properties in matrix of porous aluminum oxide,” Rossiiskie Nanotekhn., 4 (3–4), 82–86 (2009).

    Google Scholar 

  3. V. A. Sokol, V. A. Yakovtseva, and D. L. Shimanovich, “Peculiar features of application of porous aluminum oxide,” Dokl. BGUIR, No. 2, 21–27 (2012).

    Google Scholar 

  4. A. A. Vikharev, E. A. Vagina, and L. Yu. Makarenko, “Study of anodic aluminum oxide obtained in alkaline electrolyte,” Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol. 47 (7), 34–36 (2004).

    Google Scholar 

  5. A. O. Araoyinbo, A. Rahmat, M. N. Derman, and K. R. Ahmad, “Room temperature anodization of aluminum and the effect of the electrochemical cell in the formation of porous alumina films from acid and alkaline electrolytes,” Adv. Mater. Lett., No. 3 (4), 273–278 (2012).

    Article  Google Scholar 

  6. M. M. Filyak and O. N. Kanygina, “Growth of anodic aluminum oxide in alkaline electrolye,” Fund. Probl. Sovrem. Materialoved. 10 (2), 209–213 (2013).

    Google Scholar 

  7. GOST (State Standard) 9450–76: Microhardness Measurements by Diamond Tip Indentation (Izd. Standartov, Moscow, 1976).

  8. I. V. Gasenkova, E. V. Ostapenko, and I. M. Andrukhovich, “Microhardness of anodic aluminum oxide obtained in combined electrolytes,” Vestn. TGU 18 (4), 1603–1604 (2013).

    Google Scholar 

  9. B. Jonsson and S. Hogmark, “Hardness measurements of thin films,” Thin Solid Films 114 (3), 257–269 (1984).

    Article  Google Scholar 

  10. A. M. Korsunsky, M. R. McGurk, S. J. Bull, and T. F. Page, “On the hardness of coated systems,” Surf. Coat. Tech. 99, 171–183 (1998).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to M. M. Filyak.

Additional information

Original Russian Text © O.N. Kanygina, M.M. Filyak, 2016, published in Deformatsiya i Razrushenie Materialov, 2016, No. 10, pp. 26–29.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Kanygina, O.N., Filyak, M.M. Microhardness of anodic aluminum oxide formed in an alkaline electrolyte. Russ. Metall. 2017, 302–305 (2017). https://doi.org/10.1134/S0036029517040085

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0036029517040085

Keywords

  • anodic aluminum oxide
  • alkaline electrolyte
  • microhardness