Abstract:The co-continuous (HA+β-TCP)/Zn-3Sn composite was fabricated via vacuum casting-infiltration method. The microstructure, mechanical properties, corrosion behaviors, and hemolysis ratio of the composite were studied by scanning electron microscope, X-ray diffractometer, mechanical testing, electrochemical test, immersion test, and ultraviolet spectrophotometry. The results indicate that Zn-3Sn alloy infiltrated into porous HA+β-TCP scaffold, which resulted in the formation of a compact (HA+β-TCP)/Zn-3Sn co-continuous composite, without any reaction layer between the Zn-3Sn alloy and the HA+β-TCP scaffold. The compressive strength of the composite was equal to about 3/4 that of Zn-3Sn alloy bulk. The corrosion rate of composite in simulated body fluid solution was slightly higher than that of Zn-3Sn alloy bulk. The main corrosion product on the composite surface was Zn(OH)₂. The hemolysis rate of the composite was lower than that of Zn–3Sn alloy bulk and exhibited superior blood compatibility.

Key words: co-continuous (HA+β-TCP)/Zn-3Sn composite; microstructure; mechanical properties; corrosion behavior; hemolysis rate