Study on Microstructure and Corrosion Resistance of ZrO₂ Reinforced Ti Based Composite Materials

Ti based composites with different doping amount of ZrO₂ ceramics were prepared using spark plasma sintering,and the microstructure and phase composition of the Ti based materials before and after the addition of ZrO₂ particles were studied,and the influence of ZrO₂ content on the hardness and electrochemical corrosion property of Ti based composite materials was tested and studied. The results indicate that the Ti based composite materials mainly consist of equiaxed primary α phase,β phase,secondary α phase and dispersed ZrO₂ reinforcement phase. With the increase of ZrO₂ content,the hardness of Ti based composite materials significantly increases from 282.26 HV of pure titanium to 484.32 HV of the composite with 5wt% ZrO₂,and the corrosion potential of the composite materials shifts positively,and the corrosive current density decreases,and the corrosion resistance of the composite materials improves. Ti based composites with ZrO₂ content of 5wt% exhibits superior mechanical properties and corrosion resistance.