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Vol. 248, Issue 1, January 2021, pp. 30-35




Internal Stress in the Porous Anodic Alumina/Aluminum System

1, * Valentina YAKOVTSEVA, 1 Vladimir SHULGOV and 1 Dzmitry SHIMANOVICH

1 Belarusian State University of Informatics and Radioelectronics, 6 Brovka, Minsk, 220013, Belarus
1 Tel.: +375172938850

* E-mail: yakovtseva@yahoo.com


Received: 20 November 2020 /Accepted: 9 January 2021 /Published: 29 January 2021

Digital Sensors and Sensor Sysstems


Abstract: The internal stresses of the aluminum films deposited at various substrate temperatures and evaporation rates are studied. It is shown that tensile stresses are present in the aluminum film. The tensile stresses values are equal to (1.0- 3.5)107 N/m2 to be comparable with the aluminum yield point (2.3107 N/m2). Theoretical and experimental studies of deformation and stress at the porous aluminum oxide-aluminum interface are discussed. It is shown that the internal stresses in the growing porous oxide are always compressive stresses and practically do not depend on the internal stresses in the initial aluminum film. The last testifies the fact of reaching the aluminum yield point at the oxide formation.


Keywords: Aluminum, Anodic alumina, Two-layer system, Internal stress, Deformation.


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