Microstructures and properties of TiN reinforced Co-based composite coatings modified with Y2O3 by laser cladding on Ti-6Al-4V alloy

The diagram illustration for the action mechanism of Y2O3: (a) dissolution of Y2O3 and TiN, (b) re-formation of TiN and in situ formation of TiC, (c) growth of TiN, TiC and the distribution of Y atoms.690