The micro-arc oxidation method was applied to modify the surface of 3D printed titanium implants with a complex internal structure. Two different electrolyte solutions were used for thesurface modification, for which the respective working parameters of the micro-arc oxidation process were developed. Surface coatings formed with these parameters on the 3D implants have the same chemical composition and have the same surface morphology as surface coatings on 2D substrates. The measurement of the coating thickness using the X-ray microtomography demonstrates that this method is a useful tool for the thickness control of porous surface coatings at the inside and outside of the 3D titanium implants.
nal beam reflects from the mirror 3 and pass through the color filter 4 that ensures the intensity ratio Ip/Is -250. Both beams had the circular polarization after pass of the optically active analog of quote-wave plate 5. To obtain liner polarization with necessary angle @o relatively grating vector the polarizer 6 was used. The grating spacing h=Zn/II
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