▎ 摘　　要

NOVELTY - Preparation method of the in-situ self-generating titanium-aluminum composite material distributed in a network, involves (a) adding graphene nanosheets and dodecylbenzene sulfonic acid into deionized water, and carrying out ultrasonic dispersion treatment to uniformly disperse graphene in a single layer in the solution to obtain a graphene solution, (b) adding spherical titanium powder and the graphene solution into dehydrated alcohol, carrying out heating and ultrasonic stirring treatment, putting the remaining solid after evaporation into a vacuum drying oven for drying treatment to obtain titanium/graphene composite powder with graphene coating on the surface, (c) adding spherical aluminum powder and the titanium/graphene composite powder obtained in step (b) into a ball mill for ball milling to obtain uniformly mixed titanium/aluminum/graphene composite powder, and (d) preparing the in-situ titanium aluminum carbide/titanium aluminum composite material with network distribution. USE - Preparation method of in-situ self-generating titanium-aluminum composite material distributed in network, used for aerospace and armored ship. ADVANTAGE - The method enables to prepare in-situ self-generating titanium-aluminum composite material, which has improved strength, plastic toughness, coordination deformation ability, passivation crack, blocking crack expansion, and improved strength of the plastic toughness of the material simultaneously. DETAILED DESCRIPTION - Preparation method of the in-situ self-generating titanium-aluminum composite material distributed in a network, involves (a) adding graphene nanosheets and dodecylbenzene sulfonic acid into deionized water, and then carrying out ultrasonic dispersion treatment to uniformly disperse graphene in a single layer in the solution to obtain a graphene solution, (b) adding spherical titanium powder and the graphene solution obtained in step (a) into dehydrated alcohol, then carrying out heating and ultrasonic stirring treatment until the evaporation of the solution is completed, putting the remaining solid after evaporation into a vacuum drying oven for drying treatment to obtain titanium/graphene composite powder with graphene coating on the surface, (c) adding spherical aluminum powder and the titanium/graphene composite powder obtained in step (b) into a ball mill for ball milling to obtain uniformly mixed titanium/aluminum/graphene composite powder, and (d) adding the titanium/aluminum/graphene composite powder into the forming cylinder of the laser selective melting device, spreading the powder on the lifting table of the forming cylinder, placing the pure titanium substrate for laser selective melting and forming, using argon as the protective gas, where the laser scanning path adopts the "S" shape path of two adjacent layers, and the preheating temperature of the substrate is 300-400℃, the laser scanning pitch is 80-140 μm, and the scanning speed is 500-800 mm/s, and the laser power is 100-300 W, and preparing the in-situ titanium aluminum carbide/titanium aluminum composite material with network distribution.