IRAQI JOURNAL OF APPLIED PHYSICS Vol. 22, No. 3, July-September 2026, pp. 386-392 Effect of Dielectric Barrier Mariam F. Abbas* Discharge Plasma on Surface Sameer Kh. Yaseen Properties for Medium Carbon Steel Department of Physics, College of Science for...
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IRAQI JOURNAL OF APPLIED PHYSICS Vol. 22, No. 3, July-September 2026, pp. 386-392 Effect of Dielectric Barrier Mariam F. Abbas* Discharge Plasma on Surface Sameer Kh. Yaseen Properties for Medium Carbon Steel Department of Physics, College of Science for Women, This study investigates the effect of dielectric barrier discharge (DBD) plasma University of Baghdad, treatment on the surface modification of medium carbon steel (CK45). The process Baghdad, IRAQ was carried out in ambient air at a voltage of 15 kV and frequency of 20 kHz for *Corresponding author Email: exposure times of 0–12 min. The influence of plasma duration on microstructure, mariam.fadel2204m@csw.uobaghdad.edu.iq surface hardness, wear, and corrosion resistance was systematically analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical Tafel polarization. Results revealed the formation of a dense nitride–oxide layer mainly composed of Fe4N and Fe3N with minor Fe–O–N phases. The Vi
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