Low Temperature Alpha Alumina Coatings for Biomedical Implant Application

摘要

Alpha alumina thin films were deposited on titanium to assess their viability as corrosion and wear resistant biomedical implants. The films were deposited at 350°C by AC inverted cylindrical magnetron sputtering technique. No substrate heating (neither before, during, or after deposition) was used. Films were obtained at 6 kW and a 50% oxygen partial pressure by volume. The alpha phase was determined by transmission electron microscopy. Corrosion resistance tests indicated that the coated titanium had improved performance and stability compared to the uncoated titanium. However, the coefficient of friction increased with the applied film.