RT Journal Article
SR Electronic
A1 Krbata, Michal
A1 Fabo, Peter
A1 Kohutiar, Marcel
A1 Escherova, Jana
A1 Kuba, Michal
A1 Kianicova, Marta
A1 Eckert, Maros
T1 Possibilities of Using Impedance Spectroscopy for Indirect Measurements of Thin Layers of Al & Cr-Al Coatings on Ni-based Superalloy Inconel 713LC Applied by the "Out-of-pack" Diffusion Method
JF Manufacturing Technology Journal
YR 2023
VO 23
IS 3
SP 313
OP 318
DO 10.21062/mft.2023.042
UL https://journalmt.com/artkey/mft-202303-0012.php
AB The presented work deals with the research of the super-alloy Inconel 713LC, on which an Al-based coating was applied using the "Out-of-pack" diffusion coating process, or CrAl. In this contribution, the results of measuring the thickness of thin coatings using a confocal laser microscope and the method of impedance spectroscopy are presented and discussed. This can demonstrate the possibility of being used also for researching the properties of thin layers using a VF probe, which, thanks to the use of ferrite, has a practically constant inductance in the entire frequency range, and the presence of a metal sample in the magnetic circuit of the probe was manifested as a result of eddy currents by a significant decrease in the inductance value at higher frequencies. However, the measurements require precise measurement of impedance with an accuracy of 1mΩ and phase angle with an accuracy of 0.001° with high stability of the measuring frequency. For a better assessment of the parameters of the layers, it is necessary to extend the frequency range of the measurement to the range of MHz units.