Search

In this study, TiN thin films were coated on CoCrMo alloys and ceramic samples using vacuum coating technology with high-power impulse magnetron sputtering (HiPIMS), which was followed by coating at 100 and 200 °C to a thickness of 250, 500 or 750 nm to enhance the characteristics of the coated alloys. Through X-ray diffraction measurements, scanning electron microscopy, and microscale hardness testing, the structural, morphological, and mechanical characteristics of the CoCrMo and ceramic samples coated with TiN films were investigated in detail. The experimental results revealed that a smooth surface can be achieved on the film of 250 nm thickness and indicated that the TiN film with the smoother surface, formed by the vacuum coating method, has a higher hardness. It was also found that the TiN film prepared by coating at 200 °C had the smoothest surface and the highest hardness (365.64 HV0.5), leading to enhanced mechanical properties of the CoCrMo alloys. In the ceramic samples, the TiN film prepared by coating at 100 °C had the smoothest surface and the highest hardness (376.81 HV0.5). In addition, the vacuum coating process is helpful for improving the mechanical properties of TiN coating. The TiN materials are used in many sensor applications, and sensor applications can be realized using TiN/CoCrMo materials. In the future, we will study the sensing performance of TiN sensors fabricated on CoCrMo alloys, as well as implants made using the coated alloys. Then, we will further study circuit substrates, heat-resistant sensors, and corrosion- and wear-resistant parts that can be applied with TiN/Al2O3 materials. [ABSTRACT FROM AUTHOR]

In this study, ZrO2 thin films were coated on Co-Cr-Mo alloys by screen printing and spraying, which was followed by sintering at a high temperature of 750, 900, or 1100 °C to enhance the characteristics of the coated alloys. Through X-ray diffraction (XRD) measurements, scanning electron microscopy (SEM), surface roughness measurements, and microscale hardness testing, the structural, morphological, and mechanical characteristics of the Co-Cr-Mo alloys coated with ZrO2 films were investigated in detail. The experimental results revealed that both the microhardness and smoothness of the ZrO2 ceramic films prepared by screen printing and spraying methods clearly improved with increasing sintering temperature. It was also found that the increase in the sintering temperature contributes to the increased thickness and density of the films, leading to enhanced mechanical properties of the Co-Cr-Mo alloys. After sintering at 1100 °C, the ZrO2 film prepared by spraying had the smoothest surface (surface roughness: 0.70 µm) and the highest hardness (767 HV0.5). The results confirm that ZrO2 coatings on Co-Cr-Mo alloys have high potential for medical implant applications. In addition, the sintering process is helpful for improving the mechanical properties. The ZrO2 materials are used in many sensor applications, and sensing applications can be realized using ZrO2/Co-Cr-Mo materials. In the future, we will study the sensing performance of ZrO2 sensors fabricated on Co-Cr-Mo alloys as well as implants made of the coated alloys. [ABSTRACT FROM AUTHOR]