A novel fabrication method for a TiO₂ layer over CoCr alloy

ABSTRACT

This study has been initiated to form a TiO₂ layer having enhanced biological properties on the surface of a CoCr alloy, which is mostly used in manufacturing of orthopaedic implants. As a novel approach, CoCr alloy samples were first coated with titanium and then oxidised in air at 600°C for 60 h. Surface characterisation of the samples were made by structural surveys (scanning electron microscopic examinations, X-ray diffraction analyses), roughness and hardness measurements, bioactivity and wear tests. Results of the experiments have showed that fabrication of TiO₂ as the outermost surface layer caused remarkable increment in the wear resistance and the bioactivity of the CoCr alloy.

KEYWORDS:

• Biomaterial
• thermal oxidation
• cold spray
• titanium dioxide
• characterisation

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This study has been prepared as a part of the project under contract no. 214M246 financially supported by the Scientific and Technological Research Council of Turkey (Türkiye Bilimsel ve Teknolojik Araştirma Kurumu) (TUBITAK).