Abstract
Experimental data and a model are presented, and the electric field that appears in porous alumina during electrochemical anodic oxidation of aluminum in electrolytes based on an aqueous solution of oxalic acid at a voltage of 90–250 V is calculated. It is found that the electric field in the layers with a porosity of 1–10% in growing alumina reaches 109–1010 V/m, which exceeds the electric strength of the material and causes microplasma patterns emitting visible light at the pore bottom, the self-organization of the structure of porous alumina, and the anisotropy of local porous anodizing. Moreover, other new effects are to be expected during aluminum anodizing under the conditions that ensure a high electric field inside the barrier layer of porous oxide.
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Original Russian Text © S.K. Lazarouk, P.S. Katsuba, A.A. Leshok, V.B. Vysotskii, 2015, published in Zhurnal Tekhnicheskoi Fiziki, 2015, Vol. 85, No. 9, pp. 86–90
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Lazarouk, S.K., Katsuba, P.S., Leshok, A.A. et al. Effect of the local electric field on the formation of an ordered structure in porous anodic alumina. Tech. Phys. 60, 1343–1347 (2015). https://doi.org/10.1134/S1063784215090108
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DOI: https://doi.org/10.1134/S1063784215090108