The triboelectrochemical properties of TiNi and TiNi doped with ZrO2 laser clad coatings onto Ti6Al4V substrates have been investigated in 3.5% NaCl using potentiodynamic polarisation techniques. Laser cladding was achieved using a 2 kW Rofin Sinar continuous wave ytterbium laser system (YLS) at a scan speed of 0.0067 m/s. Microstructural analyses of the coatings revealed a strong metallurgical bond at the coatings-substrate interface with the absence of pores and cracks. There was a significant increase in surface microindentation hardness values of the cladded layers. Addition of ZrO2 improved the tribocorrosion property of the composite coatings. Ti-Ni-5ZrO2 had the lowest corrosion current density whilst TiNi10ZrO2 had the lowest tribocorrosion current density in investigated electrolyte.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry