Properties of Porous Ti-35Nb-7Zr-5Ta Processed by the Spacer Method for Use in Biomedical Applications
Ti-35Nb-7Zr-5Ta alloy is a promising new material for a bone graft substitute with good strength properties and an elastic modulus closer to that of bone than any other metallic material. TNZT samples until 50 vol % porosity were manufactured using ‘‘space holder’’ technique and sintering methods. Irregular ammonium carbonate powders were used as a space holder material. Complete removal carbonate from the green compact was achieved by heating at 200 °C for 5 hours and subsequent sintering at 1600 °C, with heating rate of 10 °C/min. For the alloy microstructural characterization, scanning electron microscopy was used. Density was measured by Archimedes method. The results show that the blended elemental P/M process and the space holder technique are efficient for the obtainment of highly porous samples. Foams with porosities in the range between 10% and 50% could be reached.
Lucio Salgado and Francisco Ambrozio Filho
E. B. Taddei et al., "Properties of Porous Ti-35Nb-7Zr-5Ta Processed by the Spacer Method for Use in Biomedical Applications", Materials Science Forum, Vols. 591-593, pp. 224-229, 2008