Abstract：Porous Ti-Nb-Ta-Zr alloy with Science and low modulus has become a research hot spot of biomedical
implant materials because of its non-toxic elements, excellent biocompatibility, high strength and remarkable plasticity.
In order to improve the osseointegration ability of the implant and make it biologically fixed with the host
bone, porous Ti-Nb-Ta-Zr alloy including β matrix and a small amount of second phases was prepared by powder
metallurgy using space holder method. The results show that with the increaseing of sintering temperature and
time, the density and binding strength of porous Ti-Nb-Ta-Zr alloy increase, however, when the sintering temperature
(or time) exceeds 1 200 ℃ (or 2 h), the compressive Young's modulus and yield strength decrease. It is related
to the crystal growth degree, the composition and distribution of the second phase in the alloy. The fractograph of
porous TNTZ alloy is mainly composed of cleavage surface, transcrystalline fracture with the cleavage of similarly
oriented laths in a colony and dimples, showing good plasticity.
2021, Vol. 31 
