The development of porous titanium products using slip casting |
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Authors: | Qian Xu Brian Gabbitas Steven Matthews Deliang Zhang |
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Affiliation: | 1. Waikato Centre for Advanced Materials (WaiCAM), School of Engineering, University of Waikato, Private Bag 3105, Hamilton, New Zealand;2. School of Engineering and Advanced Technology, Massey University, Private Bag 102904, North Shore City 0745, Auckland, New Zealand |
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Abstract: | An optimized titanium slurry was developed from 43 vol.% of titanium powder, 0.3 dw.% of dispersant, 0.8 dw.% of plasticizer and 0.8 dw.% of binder, mixed with a balance of distilled water, which produced a viscosity of 40 cP. It was then poured into a plaster mold to form compacts with a green density of 45%. Thermal debinding was carried out at 320 °C with an argon flow for 2 h, followed by vacuum sintering different samples at 1000 °C and 1200 °C for 0.5 h, respectively. The porous sintered compacts had satisfactory tensile strength with some plastic deformation. The increase in oxygen and carbon content during processing was minor. An X-ray diffraction pattern showed pure alpha titanium peaks without any indication of contamination from organic additives. The results from this investigation suggested that slip casting is a potentially low-cost, simple production route for manufacturing porous titanium products. |
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Keywords: | Slip casting Titanium Porous materials Tensile stress |
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