Porosity and mechanical properties of porous Ti-7.5Mo alloy for medical applications by gelcasting

A porous titanium based alloy containing 7.5% molybdenum was prepared by gelcasting. The microstructure, total porosity and mechanical properties of the sintered porous Ti-7.5Mo alloy were investigated by using electron microscopy, X-ray diffraction, compression and bending tests. The effect of gelcasting parameters on the porosity and mechanical properties of the porous Ti-7.5Mo alloy were studied. It is shown that the rheological behavior of the mixture metal slurry by adding 7.5% Mo powders improves in comparison with pure Ti powders. The open and closed three-dimensional pore morpbologies and the total porosity around 39. 15% to 45.97% can be achieved. The average pore size around 5 to 98 μm and equiaxed cL crystal grains + β phases were observed in the sintered alloy. In contrast to porous Ti by gelcasting available before, the porous Ti-7.5Mo alloy presents excellent properties, therefore being suited for medical applications.