FeAl多孔材料兼具陶瓷和金属的性能优点，是一种新型无机多孔材料。采用元素粉末制备FeAl多孔材料过程中，因Fe与Al的剧烈放热反应会引发自蔓延，导致材料变形和孔结构控制困难。因此需采用长时间固态保温的办法抑制自蔓延，但该方法耗时耗能。为此本项目提出：采用添加第三组元Si元素的方法实现多孔体的近净成形，并研究Fe-Al-Si体系的自蔓延控制理论及FeAlSi多孔材料的应用性能。主要研究内容包括：Fe-Al-Si体系中Si元素对Fe、Al元素扩散路径和反应的影响机理；Fe、Al、Si元素的反应合成及孔隙形成的热力学条件，建立反应过程中物相及孔结构演变的动力学方程，确定实现材料近净成形的热力学与动力学条件；FeAlSi多孔材料的孔结构特征，室/高温下的力学性能及抗腐蚀性能。研究成果可为剧烈放热反应体系引发的自蔓延提供控制理论依据，并为FeAlSi多孔材料的生产及应用奠定理论基础。

Porous FeAl material is a new type of inorganic porous material, which has the advantages of both ceramic and metal materials. But a great deal of heat will be released in the preparation process of FeAl porous material by using elemental powders as raw materials due to the violent reaction of Fe and Al, and thus leading to self-propagating reaction which results in the deformation and difficult pore structure controlling. The self-propagating reaction can be inhibited by long time holding at solid-state in our previous study, but this method is time and energy consuming. This project propose to study the near-net forming by adding Si element powder in porous FeAl material, the self-propagating reaction controlling theory of Fe-Al-Si system, and the application properties of porous FeAlSi materials. The main contents include: mechanisms of Si element in FeAlSi system on Fe, Al elements diffusion path and reaction, thermodynamic conditions of Fe, Al and Si powders reactive synthesis and pore formation, establishing the kinetic equation of phase and pore structure evolution in the reaction process, determination of the kinetics and dynamics conditions for near- net forming, and pore structure characteristics, mechanical property and corrosion resistance of FeAlSi porous materials at room and high temperature. The research results can provide theoretical basis for controlling self-propagating exothermic reaction system, and lay the theoretical foundation for industrial production and application of porous FeAlSi materials.