Mechanical behaviors and porosity of porous Ti prepared with large-size acicular urea as spacer

Abstract

Porous Ti scaffolds with average pore size of 600 µm and porosity ranging from 31.1 to 61.2% were successfully prepared by powder metallurgy technology employing large size acicular urea as space holder. Results indicated that the porosity (P) of porous Ti could be determined accurately by added spacer content (Sc) in the green-pressing because the relationship could be formulated as P = aSc + b, where a and b are constants. The compressive strength and structural stiffness were in the range of 50–332 MPa and 0.6–3.7 GPa, respectively. Moreover, the dependence between relative porosity and relative strength, along with the dependence between relative density and relative Yong’s modulus were formulated. Our research can provide helpful information to fabricate porous Ti with desirable structure and mechanical properties by spacer method.