en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <span lang="EN-US" style="font-size:12.0pt"><span style="line-height:200%"><span new="" roman="" style="font-family:" times="">Ni-B₄C nanocomposite coatings were deposited onto a pure Cu substrate using electroplating. Different types of current, including direct current (DC), pulse reverse current (PRC), and unipolar pulse current (PC), were applied using various concentrations of micron and nano size particles in the electroplating bath. Microstructure, hardness, and wear and corrosion behavior of the coatings were investigated. Microstructural evaluations were performed using scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). Microhardness, pin-on-disk sliding wear, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) tests were conducted on the coatings. Electrodeposition using PRC resulted in a more uniform distribution of co-deposited B₄C microparticles and nanoparticles within the coatings. Nanocomposite coatings reinforced with B₄C nanoparticles were obtained using PRC with a bath concentration of 8 g/l, exhibited higher hardness and improved wear properties compared to composite coatings containing B₄C micron-sized particles. Moreover, using PRC resulted in higher hardness values and improved wear and corrosion resistance compared to PC and DC.</span></span></span> electroplating,Ni-B4C,unipolar pulse current,pulse reverse current 9 25 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5466-1&slc_lang=en&sid=1 Seyed Ehsan Khadempir ehsan13_92@yahoo.com 1800319475328460020864 1800319475328460020864 No Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz Behnam Lotfi behnaml@scu.ac.ir 1800319475328460020865 1800319475328460020865 Yes Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, 6135473337, Iran Zohreh Sadeghian z.sadeghian@scu.ac.ir 1800319475328460020866 1800319475328460020866 No Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz