Nickel-chromium-aluminum dynamic sealing material with sandwich structure and preparation method of nickel-chromium-aluminum dynamic sealing material

The invention relates to a nickel-chromium-aluminum dynamic sealing material with a sandwich structure and a preparation method thereof, and belongs to the technical field of dynamic sealing materials. The dynamic sealing material is a nickel-chromium-aluminum dynamic sealing material with a sandwich structure, wherein the nickel-chromium-aluminum dynamic sealing material with the sandwich structure is formed after a nickel-plated fiber blank with the sandwich structure is infiltrated with Cr and Al, and the nickel-plated fiber blank with the sandwich structure is composed of surface hollow nickel fibers and internal solid nickel-plated carbon fibers. The strength and modulus of the dynamic sealing material can be effectively improved on the basis of ensuring that the dynamic sealing material is low in density, low in heat conductivity and good in high-temperature stability; and the dynamic sealing material is simple in preparation process, easy to operate and convenient for large-scale production, and has a