Fe-Al-based metal porous membrane and preparation method thereof

A method for preparing a Fe—Al-based metal porous membrane, wherein the method comprises the steps of:

• adding a Fe—Al-based metal powder and a metal fiber powder into an organic-additive-added water-based solvent, and mixing them into a slurry;
• casting the slurry, through a casting machine, to form a membrane green body on a metal substrate layer, and letting it dry;
• and
• placing the dried membrane green body in a sintering furnace, to remove organic substances and perform high-temperature sintering and predetermined-temperature reaction synthesis, thus generating a Fe—Al-based metal porous membrane removed off the organic additive and having a uniform pore structure, and forming firm sintering necks between powder particles and powder fibers in the membrane;
• the Fe—Al-based metal powder is one or two selected from a Fe3Al powder and a FeAl powder, and the metal fiber powder is one or more selected from 304L, 316L and 310S stainless steel fiber powders;
• the metal substrate layer is made of one material selected from 310S, 304L and 316L;
• and, the organic additive include one or more selected from polyvinyl alcohol, methyl cellulose, polyethylene glycol, propanetriol, and dibutyl phthalate;
• a Al powder is further added into the Fe—Al-based metal powder.