Mechanical properties of sol–gel calcium titanate bioceramic coatings on titanium

✍ Scribed by Andrei V. Stanishevsky; Samuel Holliday

• Book ID: 104094127
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 975 KB
• Volume: 202
• Category: Article
• ISSN: 0257-8972
• DOI: 10.1016/j.surfcoat.2007.07.091

✦ Synopsis

We discuss the mechanical properties and wear characteristics of sol-gel CaTiO 3 nanocrystalline ceramic coatings on titanium substrates. The structure and surface morphology of the coatings were investigated by X-ray diffraction, optical profilometry, and atomic force microscopy. The mechanical properties of CaTiO 3 coatings were characterized by using nanoindentation, scratch-and microwear-tests. The effect of titanium nitride intermediate layer on the improvement of the coating properties has been investigated. The best CaTiO 3 coatings with a TiN intermediate layer demonstrated the bonding strength up to 70 MPa, stability and low linear wear rate (∼ 1 μm per million cycles) during ball-on-disc reciprocal wear tests in micromotion (50-500 μm amplitude) with Ti6Al4V-alloy static partner at contact pressures up to 500 MPa in both dry and simulated body fluid environments.