Abstract
Open cell Ti6Al4V metallic foams were fabricated by gelcasting and subsequent sintering. Foaming was conducted in an aqueous environment by using a protein and a surfactant as gelling agent and liquid foam stabilizer, respectively. The effect of different stirring velocities (700 rpm and 1500 rpm) on porosity and pore size distribution was investigated. The shaped foams were pressureless sintered at 1000 °C, 1200 °C and 1400 °C in high vacuum and Argon. The sintering cycle was stopped at intermediate levels in order to study the compositional and morphological evolution of the foams. Ti6Al4V metallic foams with an average cell size of 499–885 μm and total porosity of 71–91 vol% were obtained. The compression strength, for samples sintered at 1400 °C, ranged from 24.4 ± 6.8 MPa up to 79.1 ± 6.5 MPa.
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