Akademik Veri Yönetim Sistemi
Surface and Coatings Technology, cilt.475, 2023 (SCI-Expanded)
Ceramic-based coatings are beneficial in improving the microstructural and micromechanical performance of the surface exposed to extreme conditions. Due to their high melting point and exceptional hardness, ceramic-based carbides and borides are deposited on surfaces using various techniques. In this study, the 90MnCrV8 cold work tool steel surface was coated with in situ ceramic FeW, B4C, and TiB2. The process was accomplished using plasma-transferred arc (PTA) direct energy deposition technique. The coatings' microstructural (phase structure, distribution chemical composition), micro-mechanical (microhardness, indentation modulus of elasticity, creep behavior, and plasticity indices), and tribological characteristics (wear and friction behavior) were examined. No voids, cracks, or discontinuity defects were found in the produced coatings. Ceramic particle-reinforced composite coatings have superior hardness. The highest hardness was observed in TiB2 ceramic coatings. They also outperformed as-plasma-modified coatings in terms of micro-mechanical properties. The superior toughness was measured in FeW-containing coatings (highest H3/E2 ratio), and the highest creep resistance was determined in B4C and TiB2 coatings. The indentation elasticity modules increased approximately 8 times with the ceramic reinforcement. The highest indentation elasticity modulus values were observed in boron-containing coatings. Ceramic particle-reinforced composite coatings performed 5 to 9 times improved wear resistance. The lowest Coefficient of friction (COF) was observed in the B4C coating. It was observed that the chemical affinity of B4C coatings is outstanding. B4C coatings exhibited superior micro-tribo-mechanical properties to other ceramic and as-plasma-modified coatings.