Preparation and Properties of Porous Fe-Al-x%TiC Composite Material

Fe-Al-x%TiC composite porous materials were synthesized by the reaction of Fe+Al+TiC mixed powder. By adding a certain proportion of TiC to try to control the self-propagating high-temperature synthesis (SHS) reactions of Fe and Al during the sintering process, the effects of adding TiC on the porosity, phase, and oxidation resistance of Fe-Al-based porous materials were studied. The results showed that the porosity of Fe-Al-x%TiC green compacts increased from 22.83 to 24.89% with an increase in the proportion of TiC, and TiC did not affect the phase change during the sintering process. In the DSC curve, after the addition of TiC, the temperature of the exothermic peak of Fe and Al increased during the sintering process, proving that the reaction between Fe and liquid Al is delayed. When TiC was 4 and 6 wt.%, an endothermic peak appeared when Al melted, which further showed that the SHS reaction was suppressed. In addition, the porous Fe-Al-x%TiC composite sintered at 1000 degrees C has better oxidation resistance and decreases with increasing TiC content, while the compression resistance increases with increasing TiC content.