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Iron foams with aligned, lamellar channels were created by directionally freeze-casting slurries of water and Fe2O3 nanopowders, sublimating the ice, and reducing and sintering under hydrogen the powders accumulated in the interdendritic spaces. Foam porosity decreases from 85 to 50% with Fe2O3 slurry fractions increasing from 14 to 23vol.%. For foams created from 18.5vol.% Fe2O3 slurries, with increasing...
Fe 2 O 3 scaffolds with an open porosity of ~81% were fabricated by freeze casting of a suspension of hematite nano-particles in liquid camphene, sublimation of the camphene, and sintering of the interconnected walls of hematite particles concentrated in the interdendritic spaces. At high solidification velocity, the camphene dendrites created, after sublimation, equiaxed, interconnected...
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