Processing and compression testing of Ti6Al4V foams for biomedical applications
Open cell Ti6Al4V foams (60% porosity) were prepared at sintering temperatures between 1,200 and 1,350 °C using ammonium bicarbonate particles (315–500 μm) as space holder. The resulting cellular structure of the foams showed bimodal pore size distribution, comprising macropores (300–500 μm) and micropores (1–30 μm). Compression tests have shown that increasing sintering temperature increased the elastic modulus, yield and compressive strength, and failure strain of foams. The improvements in the mechanical properties of foams prepared using smaller size Ti64 powder with bimodal particle distribution were attributed to the increased number of sintering necks and contact areas between the particles. Finally, the strength of foams sintered at 1,350 °C was found to satisfy the strength requirement for cancellous bone replacement.
KeywordsFoam Compressive Strength Sinter Temperature Ammonium Bicarbonate Failure Strain
The authors would like to thank the Technology Development Foundation of Turkey (TTGV) for the grant #TTGV-102/T13.
- 4.Bobyn JD, Miller JE (1994) Features of biologically fixed devices. American Academy of Orthopaedic Surgeons, ChicagoGoogle Scholar
- 8.ASTM F 1580-95, Standard specification for titanium and Ti6Al4V alloy powders for coating surgical implants.Google Scholar
- 12.Guden M, Celik E, Cetiner S, Aydin A (2004) In: Biomaterials: from molecules to engineered tissues, p 257Google Scholar
- 13.Tencer F, Johnson KD (1994) In: Biomechanics in orthopaedic trauma: bone fracture and fixation. Martin Dunitz Ltd, London, p 954Google Scholar
- 14.Burstein AH, Reilly DT, Martens M (1976) J Bone Joint Surg 58A:82Google Scholar