Method for preparing gradient materials through multi-crucible and multi-nozzle spray forming

The invention discloses a method for preparing gradient materials through multi-crucible and multi-nozzle spray forming, which adopts the multi-crucible and multi-nozzle spray forming technology. The method comprises the following steps: firstly, heating and rising the temperature under the protection of inert gas after the surface of a coating substrate is cleaned; secondly, arranging more than one alloy liquid crucible above the coating substrate in sequence, wherein the alloy liquid in each crucible is sprayed and deposited on the surface of the substrate in sequence through being atomized by the high-pressure inert gas to obtain the multi-layered gradient materials. Through the method, the nozzle atomization efficiency and the deposition efficiency are improved, and the continuous preparation of the multi-layered composite materials is realized. The obtained gradient materials have the advantages of low porosity of a deposit perform, fine and uniform organization, better interface binding performance and high material yield.