Mechanical Properties of Porous Titanium Compacts Synthesized by Powder Sintering

摘要

Commercially pure Ti and Ti alloy powders with various particle sizes were prepared by plasma rotating electrode processing and gas atomization, and porous Ti and Ti alloy compacts with low elastic modulus for biomedical applications were synthesized by powder sintering. Microstructures and mechanical properties of the compacts were investigated in this study. Porous compacts having porosities of 0-35 vol% are successfully synthesized by controlling sintering temperature and applied stress. It is found that Young's modulus and compressive yield strength decrease linearly with increasing porosity, and porous Ti and Ti alloy compacts having Young's modulus identical to that of human bone are obtained by controlling porosity. Low Young's modulus and high compressive yield stress are simultaneously attained by powder sintering of beta Ti alloy with low Young's modulus in a bulk state.