Sintered Ti-Ti3P-CaO electrodes and their application for pulsed electrospark treatment of titanium

In this study, the effect of mechanical treatment on the structure and phase composition of Ti+10% Ca3(PO4)2 powder mixtures was investigated. Ceramic Ti-Ti3P-CaO electrode materials with a high component homogeneity and a residual porosity of 5-7% were obtained in a process involving cold pressing and vacuum sintering. The erosive power of the sintered ceramic-metal Ti-Ti3P-CaO electrode during the electrospark treatment of titanium substrates was examined, and a comparison with the SHS TiC0.5-Ti3POx-CaO electrodes was performed. Both the Ti-Ti3P-CaO and TiC0.5-Ti3POx-CaO coatings exhibited high denseness with a width of approximately 20 μm, a hardness of 3.6 GPa, a roughness of 3.3-4.6 μm and a uniform distribution of bioactive calcium and phosphorus elements.