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Volume 2018, Article ID 8459768, 7 pages
https://doi.org/10.1155/2018/8459768
Research Article

Analysis of Al2O3 Nanostructure Using Scanning Microscopy

Faculty of Computer Science and Materials Science, University of Silesia, Bankowa 12, Katowice, Poland

Correspondence should be addressed to Władysław Skoneczny; lp.ude.su@ynzcenoks.walsydalw

Received 27 October 2017; Revised 14 February 2018; Accepted 1 March 2018; Published 14 May 2018

Academic Editor: Guosong Wu

Copyright © 2018 Marek Kubica et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

It has been reported that the size and shape of the pores depend on the structure of the base metal, the type of electrolyte, and the conditions of the anodizing process. The paper presents thin Al2O3 oxide layer formed under hard anodizing conditions on a plate made of EN AW-5251 aluminum alloy. The oxidation of the ceramic layer was carried out for 40–80 minutes in a three-component SAS electrolyte (aqueous solution of acids: sulphuric 33 ml/l, adipic 67 g/l, and oxalic 30 g/l) at a temperature of 293–313 K, and the current density was 200–400 A/m2. Presented images were taken by a scanning microscope. A computer analysis of the binary images of layers showed different shapes of pores. The structure of ceramic Al2O3 layers is one of the main factors determining mechanical properties. The resistance to wear of specimen-oxide coating layer depends on porosity, morphology, and roughness of the ceramic layer surface. A 3D oxide coating model, based on the computer analysis of images from a scanning electron microscope (Philips XL 30 ESEM/EDAX), was proposed.