Preparation method of high-rigidity particle-reinforced aluminum-lithium-based composite material

The invention provides a preparation method of a high-rigidity particle-reinforced aluminum-lithium-based composite material, which is applied to the technical field of aluminum-lithium alloys, and comprises the following steps: carrying out mechanical alloying on reinforced phase particles and Zr powder or Sc powder to obtain first reinforced phase particles; the first reinforced phase particles are screened and continue to be subjected to mechanical alloying with Al powder, and second reinforced phase particles are obtained; melting the aluminum-lithium alloy and carrying out three-stage heat preservation on the aluminum-lithium alloy melt, and adding the second reinforced phase particles into the aluminum-lithium alloy melt in a second heat preservation stage; according to the method, the interface reaction between SiC particles and the aluminum-lithium alloy can be effectively inhibited, brittle Li2C2 and Al4C3 are prevented from being generated, the strength and rigidity of the aluminum-lithium-based com