Properties of Porous Ti-35Nb-7Zr-5Ta Processed by the Spacer Method for Use in Biomedical Applications

Abstract:

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.

• Periodical: Materials Science Forum (Volumes 591-593)
• Pages: 224-229
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.591-593.224
• Online since: August 2008
• Authors: Elisa B. Taddei, V.A.R. Henriques, Cosme Roberto Moreira Silva, Carlos Alberto Alves Cairo
• Keywords: Biomaterial, Porous Metal, Powder Metallurgy (PM), Sintering

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