Effect of Slurry Solid phase Content on the Process and Properties of Gel Injection Moulding Ti10Mo28Nb3Zr Alloy

Abstract

In order to solve the problems of high elastic modulus and biotoxicity of human bone implants, Ti10Mo28Nb3Zr, a component with low elastic modulus that had been calculated and verified by first-principles experiments, was used as raw material to prepare bone implant titanium alloy with low elastic modulus and good biocompatibility by means of gel injection and microwave sintering methods. The effects of solid content on gel curing time, shrinkage, porosity, compressive strength and elastic modulus of the materials were analyzed by scanning electron microscope, X-ray diffraction, metallographic microscope and compression tests. When the solid phase content increases from 30 to 45%, the gel time reduces from 300 to 205 s. This indicates that a higher solid phase content results in a shorter gel curing time. Meanwhile, the axial shrinkage decreased from 13.67 to 6.43%, and the radial shrinkage decreased from 13.11 to 6.18%. Moreover, the compressive strength increased from 125 to 215 MPa, the elastic modulus increased from 10.46 to 25.11 GPa. The results provide a basis for the preparation of medical bio-titanium alloy by gel injection molding and its application in bone implant materials.