Iron aluminides, as a technological material, are a member of multicomponent alloys, which, besides iron and aluminium. Due to superior anti-corrosion properties at high temperatures, these alloys are used as coating materials in many surface development processes. Copper is widely used in industry because of its commercially desired properties such as high thermal and electric conductivity. However, with a lower tensile strength and poor wear resistance, they cannot be used for special applications where an excellent strength and/or good wear resistance are required. By coating the surface of new, damaged, or worn-out copper based products using the electro spark deposition (ESD) improves the performance properties of the base metal. In this study, 1% TiC reinforced iron aluminide intermetallic composite electrode was used to coat the copper surface in order to increase the hardness and improve the wear rate by forming a hard structure using ESD coating method. It has been observed that surface hardness increased by about 11 times the end of experimental studies. Wear rate of the coated material increased compared to the uncoated material while the uncoated sample exhibits adhesive wear, also the coated sample exhibits both adhesive and abrasive wear.

In this study, CrMnFeCoNi high entropy alloy was produced using TIG melting reverse vacuum method using a shielding gas atmosphere. Produced samples were boronized with pack boriding method at 1173, 1223, 1273 K temperatures and for 2, 4 and 6 h. As a result of the experiments, the morphology of the boride layers formed on the high entropy alloy surfaces was investigated by SEM microscope. The hardness values were measured with a microhardness device and the phases formed on the boride layer were determined by the XRD method. In addition, the thickness and growth kinetics of the boride layer on the high entropy alloy were investigated. The boride coating thickness ranges from 38 µm to 268 µm. FCC crystal structure is present in the HEAs produced in XRD examinations and the hardness value was determined as 242 HV_0,05 (± 15). B-dependent phases of Cr, Mn, Fe, Co, Ni were obtained in the coating layer and the hardness value was measured as 2250 HV_0,05 maximum. The boride layer activation energy value of the coated HEA was calculated as 376,465 kJ/mol.

Electro-spark deposition (ESD) is one of the most effective methods for improving the surfaces of metallic materials by applying ceramic-based cermet coatings. In this study, TiC and WC coatings were deposited on the surface of AISI M2 high-speed steel using the ESD method. Subsequently, the coated surfaces were examined through microstructure, phase structure, microhardness, friction, wear, and electrochemical corrosion tests, and compared with untreated AISI M2 steel. The TiC and WC phase coatings obtained with ESD resulted in a significant improvement, with hardness levels exceeding four times that of AISI M2 steel, leading to reduced wear volume losses and friction coefficients. Furthermore, the cermet coatings formed on the surface exhibited 2–3 times improvement in corrosion resistance due to their lower conductivity. This study demonstrates that WC coatings may offer a more effective solution for enhancing the wear resistance of AISI M2 steel, while TiC coatings could be more effective in improving corrosion resistance.