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Effect of porosity on the indentation behaviour of nanoporous alumina films

Bobji, MS and Pendyala, Prashant and Gupta, Preeti and Kalode, Pranav (2011) Effect of porosity on the indentation behaviour of nanoporous alumina films. In: International Journal of Surface Science and Engineering, 5 (1, Sp.). pp. 51-62.

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Anodising aluminium in an acid electrolyte results in a porous alumina film. The pores are uniformly distributed and their structure can be controlled by varying the anodising parameters. In this study, the pore structure of the anodic alumina films is varied systematically by varying the anodising time and a subsequent pore widening chemical etch. The indentation behaviour of the resulting film is studied using a depth sensing nanoindenter. The hardness of the films was found to be decreasing with decreasing solid area fraction. Understanding the deformation behaviour of nanoporous alumina would help tailoring the mechanical properties by tuning the geometry.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Inderscience Publishers.
Keywords: nanoporous alumina;NPA;nanoindentation;surface mechanical properties;hardness
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 04 Jul 2011 08:08
Last Modified: 04 Jul 2011 08:08
URI: http://eprints.iisc.ac.in/id/eprint/38883

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