Characterization of Niobium Carbide Film Deposited on Ti-6Al-7Nb Alloy by Low Temperature Plasma Glow Discharge
نویسندگان
1 Department of Prosthetic Dental Techniques, College of Health and Medical Techniques, AlEsraa University, Baghdad, Iraq
2 Department of Prosthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
3 Department of Prosthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
doi
10.22052/JNS.2025.04.044چکیده
Niobium carbide thin films were successfully deposited on a Ti-6Al-7Nb substrate using a low-temperature plasma glow discharge method, employing argon gas and C2H2 as the carbon source. Three different deposition times were employed to apply the coatings: Group 1 had a deposition period of two hours, Group 2 had a deposition period of four hours, and Group 3 had a deposition period of six hours. The phase composition, microstructure, surface morphology, roughness, and wettability of the films were examined as a function of deposition time. Various phases of niobium carbide were observed, with the sputter deposition process resulting in a nanocomposite structure composed of a nanocrystalline and often substoichiometric niobium carbide phase, along with an amorphous carbon phase. The microstructure of the deposited layers exhibited consistency and homogeneity. The SEM images displayed an organized morphology characterized by the material’s agglomerating feature on a striated texture. The coated samples exhibited a more prominent and rougher surface, with noticeable projections. Furthermore, the water contact angle value decreased from approximately 63° for the untreated Ti-6Al-7Nb surface to around 44° for the coated samples.
