INVESTIGATION OF THE SURFACE MORPHOLOGY OF A FERROELECTRIC BARIUM TITANATE FILM
OBTAINED BY MICROARC OXIDATION 

Ekaterina A. Pecherskaya, Doctor of technical sciences, professor, head of the sub-department of information and measuring equipment and metrology, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: iit@pnzgu.ru
Ulyana S. Chikhrina, Student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: chikhulyana@yandex.ru
Oleg V. Karpanin, Head of calibration and repair service, sub-department of information and measuring equipment and metrology, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: karpanino@mail.ru
Pavel E. Golubkov, Candidate of technical sciences, associate professor of the sub-department of information and measuring equipment, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: golpavpnz@yandex.ru
Sergey A. Gurin, Candidate of technical sciences, senior researcher of the laboratory "Polet", Penza State University (40 Krasnaya street, Penza, Russia), E-mail: iit@pnzgu.ru

Background. The object of research is a ferroelectric film of barium titanate, for which the authors proposed a method of microarc oxidation, previously widely used for the development of the surface of products made of metals and alloys of the light group. The subject of research is the parameters characterizing the quality of the obtained film, which also determine the possible directions of its use. In the presented study, the spectral composition and surface roughness are considered as such parameters. Materials and methods. The method of microarc oxidation was used to obtain a ferroelectric film of barium titanate. In this case, the titanium substrate was immersed in a galvanic cell filled with an electrolyte based on barium hydroxide. A Mitaka PF-60 laser contour profiler was used to measure roughness. Results. The results of measurements of surface roughness and spectral composition of barium titanate on two types of samples are presented: with a substrate pre-prepared in lactic acid and an untreated titanium substrate. Conclusions. The main parameters characterizing the roughness are determined: the arithmetic mean deviation of the profile, the height of the irregularities at ten points, the maximum height of the irregularities and others. The surface roughness of barium titanate depends on the method of its preparation and processing. A comparative analysis of the presented experimental results was performed, which confirmed an increase in hardness and a decrease in the roughness of coatings for substrates that were subjected to preliminary etching.

 microarc oxidation, roughness measurements, spectral composition, barium titanate

Pecherskaya E.A., Chikhrina U.S., Karpanin O.V., Golubkov P.E., Gurin S.A. Investigation of the surface morphology of a ferroelectric barium titanate film obtained by microarc oxidation. Izmerenie. Monitoring. Upravlenie. Kontrol' = Measuring. Monitoring. Management. Control. 2024;(4):116–122. (In Russ.). doi: 10.21685/2307-5538-2024-4-13